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msp430 ports: improve RTS control - avoid enabling RTS after single byte block read with pending received byte

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This commit is contained in:
Matthias Ringwald 2019-01-23 17:22:14 +01:00
parent 6f7dfc693b
commit 8a5282fd8d
3 changed files with 37 additions and 16 deletions
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19
port/ez430-rf2560/src/hal_uart_dma.c
View File

@ -265,17 +265,23 @@ static inline void hal_uart_dma_disable_rx(void){
P1OUT |= BIT3; // = 1 - RTS high -> stop
}
// int used to indicate a request for more new data
void hal_uart_dma_receive_block(uint8_t *buffer, uint16_t len){
UCA2IE &= ~UCRXIE ; // disable RX interrupts
// disable RX interrupts
UCA2IE &= ~UCRXIE ;
rx_buffer_ptr = buffer;
bytes_to_read = len;
UCA2IE |= UCRXIE; // enable RX interrupts
hal_uart_dma_enable_rx(); // enable receive
// check if byte already received
int pending = UCA2IFG & UCRXIFG;
// enable RX interrupts - will trigger ISR below if byte pending
UCA2IE |= UCRXIE;
// if byte was pending, ISR controls RTS
if (!pending) {
hal_uart_dma_enable_rx();
}
}
void hal_uart_dma_set_sleep(uint8_t sleep){
@ -305,6 +311,7 @@ void usbRxTxISR(void){
++rx_buffer_ptr;
--bytes_to_read;
if (bytes_to_read > 0) {
hal_uart_dma_enable_rx();
return;
}
P1OUT |= BIT3; // = 1 - RTS high -> stop

19
port/msp-exp430f5438-cc2564b/src/hal_uart_dma.c
View File

@ -265,17 +265,23 @@ static inline void hal_uart_dma_disable_rx(void){
P1OUT |= BIT4; // = 1 - RTS high -> stop
}
// int used to indicate a request for more new data
void hal_uart_dma_receive_block(uint8_t *buffer, uint16_t len){
UCA2IE &= ~UCRXIE ; // disable RX interrupts
// disable RX interrupts
UCA2IE &= ~UCRXIE ;
rx_buffer_ptr = buffer;
bytes_to_read = len;
UCA2IE |= UCRXIE; // enable RX interrupts
hal_uart_dma_enable_rx(); // enable receive
// check if byte already received
int pending = UCA2IFG & UCRXIFG;
// enable RX interrupts - will trigger ISR below if byte pending
UCA2IE |= UCRXIE;
// if byte was pending, ISR controls RTS
if (!pending) {
hal_uart_dma_enable_rx();
}
}
void hal_uart_dma_set_sleep(uint8_t sleep){
@ -305,6 +311,7 @@ void usbRxTxISR(void){
++rx_buffer_ptr;
--bytes_to_read;
if (bytes_to_read > 0) {
hal_uart_dma_enable_rx();
return;
}
P1OUT |= BIT4; // = 1 - RTS high -> stop

15
port/msp430f5229lp-cc2564b/src/hal_uart_dma.c
View File

@ -278,17 +278,23 @@ static inline void hal_uart_dma_disable_rx(void){
RTS_OUT |= RTS_PIN; // = 1 - RTS high -> stop
}
// int used to indicate a request for more new data
void hal_uart_dma_receive_block(uint8_t *buffer, uint16_t len){
UCA0IE &= ~UCRXIE ; // disable RX interrupts
// disable RX interrupts
UCA0IE &= ~UCRXIE;
rx_buffer_ptr = buffer;
bytes_to_read = len;
// check if byte already received
int pending = UCAIFG & UCRXIFG;
// enable RX interrupts - will trigger ISR below if byte pending
UCA0IE |= UCRXIE; // enable RX interrupts
hal_uart_dma_enable_rx(); // enable receive
// if byte was pending, ISR controls RTS
if (!pending) {
hal_uart_dma_enable_rx();
}
}
void hal_uart_dma_set_sleep(uint8_t sleep){
@ -318,6 +324,7 @@ void usbRxTxISR(void){
++rx_buffer_ptr;
--bytes_to_read;
if (bytes_to_read > 0) {
hal_uart_dma_enable_rx();
return;
}
RTS_OUT |= RTS_PIN; // = 1 - RTS high -> stop