Posted on January 10, 2018 at 01:21I'm sorry I copied 2 SystemClock_Configs() in the prior paste. Ignore the SystemClock_Config1() as it is not used. The System clock is configured prior to configuring any peripherals. The clock configurations is straight from the F722 I2C example code and the I2C peripheral works correctly. As I said, I removed the solder bridges from SB132 and SB133 and they are open now. PA11 and PA12 are routed to pins 14 and 12 of the CN12 connector pinouts and that's where I'm looking for the CAN TX signals. I see a RX signal when I send a packet from a USB/CAN dongle.
The main sequence is as follows:
int main(void)
{
/* Enable the CPU Cache */
CPU_CACHE_Enable();
/* STM32F7xx HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 216 MHz */
SystemClock_Config();
/* Configure LED1 and LED3 */
BSP_LED_Init(LED1);
BSP_LED_Init(LED3);
/* Configure User push-button */
BSP_PB_Init(BUTTON_USER,BUTTON_MODE_GPIO);
&sharpif CAN
/*♯♯-1- Configure the CAN peripheral ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
CAN_Config();
/* Enable interrupt driven CAN Receive */
if (HAL_CAN_Receive_IT(&CanHandle, CAN_FIFO0) != HAL_OK)
{
/* Reception Error */
Error_Handler();
}
&sharpendif
while (1)
{
/* Wait for User push-button press before starting the Communication */
while (BSP_PB_GetState(BUTTON_USER) != GPIO_PIN_SET)
{
}
/* Delay to avoid that possible signal rebound is taken as button release */
HAL_Delay(50);
/* Wait for User push-button release before starting the Communication */
while (BSP_PB_GetState(BUTTON_USER) != GPIO_PIN_RESET)
{
}
&sharpif CAN
// if (sendit == 1)
{
/* Set the data to be transmitted */
CanHandle.pTxMsg->DLC = 3; // ♯ of bytes
CanHandle.pTxMsg->Data[0] = 5;
CanHandle.pTxMsg->Data[1] = 4;
CanHandle.pTxMsg->Data[2] = 3;
/*♯♯-3- Start the Transmission process ♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯♯*/
if ((HAL_CAN_Transmit(&CanHandle, (uint32_t)10)) != HAL_OK) // this function returns HAL_OK
{
/* Transmission Error */
// Error_Handler();
err = 1;
}
sendit= 0;
}
&sharpendif
}
}
}
A very close derivative(clocks different of course) of this works on the F303 Nucleo board. Any thoughts appreciated.
Thanks,
