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samv71-xplained-atwilc3000: implement hal_uart_dma_set_flowcontrol

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This commit is contained in:
Matthias Ringwald 2017-07-26 22:38:12 +02:00
parent 13b8e9b1e4
commit c267d18bb4
1 changed files with 21 additions and 9 deletions
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30
port/samv71-xplained-atwilc3000/main.c
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@ -139,6 +139,8 @@ static volatile uint16_t bytes_to_write = 0;
static volatile uint8_t * tx_buffer_ptr = 0; static volatile uint8_t * tx_buffer_ptr = 0;
#endif #endif
static int simulate_flowcontrol;
// handlers // handlers
static void (*rx_done_handler)(void) = dummy_handler; static void (*rx_done_handler)(void) = dummy_handler;
static void (*tx_done_handler)(void) = dummy_handler; static void (*tx_done_handler)(void) = dummy_handler;
@ -150,10 +152,12 @@ static void (*cts_irq_handler)(void) = dummy_handler;
// I didn't see RTS going up automatically up, ever. So, at least for RTS, the automatic management // I didn't see RTS going up automatically up, ever. So, at least for RTS, the automatic management
// is just a glorified GPIO pin control feature, which provides no benefit, but irritates a lot // is just a glorified GPIO pin control feature, which provides no benefit, but irritates a lot
static void hal_uart_rts_high(void){ static inline void hal_uart_rts_high(void){
if (!simulate_flowcontrol) return;
BOARD_USART->US_CR = US_CR_RTSEN; BOARD_USART->US_CR = US_CR_RTSEN;
} }
static void hal_uart_rts_low(void){ static inline void hal_uart_rts_low(void){
if (!simulate_flowcontrol) return;
BOARD_USART->US_CR = US_CR_RTSDIS; BOARD_USART->US_CR = US_CR_RTSDIS;
} }
@ -187,12 +191,10 @@ void hal_uart_dma_init(void)
}; };
/* Configure USART mode. */ /* Configure USART mode. */
#if 0 simulate_flowcontrol = 0;
usart_init_hw_handshaking(BOARD_USART, &bluetooth_settings, sysclk_get_peripheral_hz());
hal_uart_rts_low();
#else
usart_init_rs232(BOARD_USART, &bluetooth_settings, sysclk_get_peripheral_hz()); usart_init_rs232(BOARD_USART, &bluetooth_settings, sysclk_get_peripheral_hz());
#endif // Set RTS = 0 (normal mode)
BOARD_USART->US_CR = US_CR_RTSEN;
/* Disable all the interrupts. */ /* Disable all the interrupts. */
usart_disable_interrupt(BOARD_USART, ALL_INTERRUPT_MASK); usart_disable_interrupt(BOARD_USART, ALL_INTERRUPT_MASK);
@ -296,8 +298,18 @@ int hal_uart_dma_set_baud(uint32_t baud){
return 0; return 0;
} }
int hal_uart_dma_set_flowcontrol(uint32_t flowcontrol){ int hal_uart_dma_set_flowcontrol(int flowcontrol){
UNUSED(flowcontrol); simulate_flowcontrol = flowcontrol;
if (flowcontrol){
/* Set hardware handshaking mode. */
BOARD_USART->US_MR = (BOARD_USART->US_MR & ~US_MR_USART_MODE_Msk) | US_MR_USART_MODE_HW_HANDSHAKING;
hal_uart_rts_low();
} else {
/* Set nomal mode. */
BOARD_USART->US_MR = (BOARD_USART->US_MR & ~US_MR_USART_MODE_Msk) | US_MR_USART_MODE_NORMAL;
// Set RTS = 0 (normal mode)
BOARD_USART->US_CR = US_CR_RTSEN;
}
return 0; return 0;
} }