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Refs #591. Improved CAN clock configuration by directly using the APB1 clock frequency. 

git-svn-id: https://svn.code.sf.net/p/openblt/code/trunk@583 5dc33758-31d5-4daf-9ae8-b24bf3d40d73
This commit is contained in:
Frank Voorburg 2018-08-07 21:00:03 +00:00
parent d5cbf80a06
commit 330ed30a80
17 changed files with 124 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Target/Demo/ARMCM0_STM32F0_Nucleo_F091RC_GCC/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM0_STM32F0_Nucleo_F091RC_IAR/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM0_STM32F0_Nucleo_F091RC_Keil/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM0_STM32F0_Nucleo_F091RC_TrueStudio/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM3_STM32F2_Olimex_STM32P207_GCC/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/4) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/4)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM3_STM32F2_Olimex_STM32P207_IAR/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/4) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/4)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM3_STM32F2_Olimex_STM32P207_TrueStudio/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/4) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/4)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM4_STM32F3_Nucleo_F303K8_GCC/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/2) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/2)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM4_STM32F3_Nucleo_F303K8_IAR/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/2) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/2)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

8
Target/Demo/ARMCM4_STM32F3_Nucleo_F303K8_TrueStudio/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/2) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/2)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )

10
Target/Demo/ARMCM4_STM32L4_Nucleo_L476RG_GCC/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )
@ -335,7 +339,7 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
****************************************************************************************/
static void BootComCanInit(void)
{
unsigned short prescaler;
unsigned short prescaler = 0;
unsigned char tseg1 = 0, tseg2 = 0;
CAN_FilterTypeDef filterConfig;
unsigned long rxMsgId = BOOT_COM_CAN_RX_MSG_ID;

10
Target/Demo/ARMCM4_STM32L4_Nucleo_L476RG_IAR/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )
@ -335,7 +339,7 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
****************************************************************************************/
static void BootComCanInit(void)
{
unsigned short prescaler;
unsigned short prescaler = 0;
unsigned char tseg1 = 0, tseg2 = 0;
CAN_FilterTypeDef filterConfig;
unsigned long rxMsgId = BOOT_COM_CAN_RX_MSG_ID;

10
Target/Demo/ARMCM4_STM32L4_Nucleo_L476RG_TrueStudio/Prog/boot.c
View File

@ -303,14 +303,18 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
unsigned char *tseg1, unsigned char *tseg2)
{
unsigned char cnt;
unsigned long canClockFreqkHz;
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = HAL_RCC_GetPCLK1Freq() / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ( (*prescaler > 0) && (*prescaler <= 1024) )
@ -335,7 +339,7 @@ static unsigned char CanGetSpeedConfig(unsigned short baud, unsigned short *pres
****************************************************************************************/
static void BootComCanInit(void)
{
unsigned short prescaler;
unsigned short prescaler = 0;
unsigned char tseg1 = 0, tseg2 = 0;
CAN_FilterTypeDef filterConfig;
unsigned long rxMsgId = BOOT_COM_CAN_RX_MSG_ID;

12
Target/Source/ARMCM0_STM32F0/can.c
View File

@ -32,6 +32,7 @@
****************************************************************************************/
#include "boot.h" /* bootloader generic header */
#include "stm32f0xx.h" /* STM32 CPU and HAL header */
#include "stm32f0xx_ll_rcc.h" /* STM32 LL RCC header */
#if (BOOT_COM_CAN_ENABLE > 0)
@ -116,14 +117,21 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
blt_int8u *tseg1, blt_int8u *tseg2)
{
blt_int8u cnt;
blt_int32u canClockFreqkHz;
LL_RCC_ClocksTypeDef rccClocks;
/* read clock frequencies */
LL_RCC_GetSystemClocksFreq(&rccClocks);
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = rccClocks.PCLK1_Frequency / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ((*prescaler > 0) && (*prescaler <= 1024))

14
Target/Source/ARMCM3_STM32F2/can.c
View File

@ -32,6 +32,7 @@
****************************************************************************************/
#include "boot.h" /* bootloader generic header */
#include "stm32f2xx.h" /* STM32 CPU and HAL header */
#include "stm32f2xx_ll_rcc.h" /* STM32 LL RCC header */
#if (BOOT_COM_CAN_ENABLE > 0)
@ -126,14 +127,21 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
blt_int8u *tseg1, blt_int8u *tseg2)
{
blt_int8u cnt;
blt_int32u canClockFreqkHz;
LL_RCC_ClocksTypeDef rccClocks;
/* read clock frequencies */
LL_RCC_GetSystemClocksFreq(&rccClocks);
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = rccClocks.PCLK1_Frequency / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/4) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/4)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ((*prescaler > 0) && (*prescaler <= 1024))
@ -158,7 +166,7 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
****************************************************************************************/
void CanInit(void)
{
blt_int16u prescaler;
blt_int16u prescaler = 0;
blt_int8u tseg1 = 0, tseg2 = 0;
CAN_FilterConfTypeDef filterConfig;
blt_int32u rxMsgId = BOOT_COM_CAN_RX_MSG_ID;

14
Target/Source/ARMCM4_STM32F3/can.c
View File

@ -32,6 +32,7 @@
****************************************************************************************/
#include "boot.h" /* bootloader generic header */
#include "stm32f3xx.h" /* STM32 CPU and HAL header */
#include "stm32f3xx_ll_rcc.h" /* STM32 LL RCC header */
#if (BOOT_COM_CAN_ENABLE > 0)
@ -116,14 +117,21 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
blt_int8u *tseg1, blt_int8u *tseg2)
{
blt_int8u cnt;
blt_int32u canClockFreqkHz;
LL_RCC_ClocksTypeDef rccClocks;
/* read clock frequencies */
LL_RCC_GetSystemClocksFreq(&rccClocks);
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = rccClocks.PCLK1_Frequency / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ/2) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ/2)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ((*prescaler > 0) && (*prescaler <= 1024))
@ -148,7 +156,7 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
****************************************************************************************/
void CanInit(void)
{
blt_int16u prescaler;
blt_int16u prescaler = 0;
blt_int8u tseg1 = 0, tseg2 = 0;
CAN_FilterConfTypeDef filterConfig;
blt_int32u rxMsgId = BOOT_COM_CAN_RX_MSG_ID;

14
Target/Source/ARMCM4_STM32L4/can.c
View File

@ -32,6 +32,7 @@
****************************************************************************************/
#include "boot.h" /* bootloader generic header */
#include "stm32l4xx.h" /* STM32 CPU and HAL header */
#include "stm32l4xx_ll_rcc.h" /* STM32 LL RCC header */
#if (BOOT_COM_CAN_ENABLE > 0)
@ -110,14 +111,21 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
blt_int8u *tseg1, blt_int8u *tseg2)
{
blt_int8u cnt;
blt_int32u canClockFreqkHz;
LL_RCC_ClocksTypeDef rccClocks;
/* read clock frequencies */
LL_RCC_GetSystemClocksFreq(&rccClocks);
/* store CAN peripheral clock speed in kHz */
canClockFreqkHz = rccClocks.PCLK1_Frequency / 1000u;
/* loop through all possible time quanta configurations to find a match */
for (cnt=0; cnt < sizeof(canTiming)/sizeof(canTiming[0]); cnt++)
{
if (((BOOT_CPU_SYSTEM_SPEED_KHZ) % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
if ((canClockFreqkHz % (baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1))) == 0)
{
/* compute the prescaler that goes with this TQ configuration */
*prescaler = (BOOT_CPU_SYSTEM_SPEED_KHZ)/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
*prescaler = canClockFreqkHz/(baud*(canTiming[cnt].tseg1+canTiming[cnt].tseg2+1));
/* make sure the prescaler is valid */
if ((*prescaler > 0) && (*prescaler <= 1024))
@ -142,7 +150,7 @@ static blt_bool CanGetSpeedConfig(blt_int16u baud, blt_int16u *prescaler,
****************************************************************************************/
void CanInit(void)
{
blt_int16u prescaler;
blt_int16u prescaler = 0;
blt_int8u tseg1 = 0, tseg2 = 0;
CAN_FilterTypeDef filterConfig;
blt_int32u rxMsgId = BOOT_COM_CAN_RX_MSG_ID;