abawo/pico-sdk
3
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Enable UART RX timeout IRQ, as well as RX IRQ, so that individual characters can be received.

Browse Source
This commit is contained in:
Luke Wren 2021-07-09 11:44:40 +01:00
parent 9a586371db
commit 2622e9bc29
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/rp2_common/hardware_uart/include/hardware/uart.h
View File

@ -205,12 +205,17 @@ static inline void uart_set_format(uart_inst_t *uart, uint data_bits, uint stop_
* this function. * this function.
* *
* \param uart UART instance. \ref uart0 or \ref uart1 * \param uart UART instance. \ref uart0 or \ref uart1
* \param rx_has_data If true an interrupt will be fired when the RX FIFO contain data. * \param rx_has_data If true an interrupt will be fired when the RX FIFO contains data.
* \param tx_needs_data If true an interrupt will be fired when the TX FIFO needs data. * \param tx_needs_data If true an interrupt will be fired when the TX FIFO needs data.
*/ */
static inline void uart_set_irq_enables(uart_inst_t *uart, bool rx_has_data, bool tx_needs_data) { static inline void uart_set_irq_enables(uart_inst_t *uart, bool rx_has_data, bool tx_needs_data) {
// Both UARTRXINTR (RX) and UARTRTINTR (RX timeout) interrupts are
// required for rx_has_data. RX asserts when >=4 characters are in the RX
// FIFO (for RXIFLSEL=0). RT asserts when there are >=1 characters and no
// more have been received for 32 bit periods.
uart_get_hw(uart)->imsc = (bool_to_bit(tx_needs_data) << UART_UARTIMSC_TXIM_LSB) | uart_get_hw(uart)->imsc = (bool_to_bit(tx_needs_data) << UART_UARTIMSC_TXIM_LSB) |
(bool_to_bit(rx_has_data) << UART_UARTIMSC_RXIM_LSB); (bool_to_bit(rx_has_data) << UART_UARTIMSC_RXIM_LSB) |
(bool_to_bit(rx_has_data) << UART_UARTIMSC_RTIM_LSB);
if (rx_has_data) { if (rx_has_data) {
// Set minimum threshold // Set minimum threshold
hw_write_masked(&uart_get_hw(uart)->ifls, 0 << UART_UARTIFLS_RXIFLSEL_LSB, hw_write_masked(&uart_get_hw(uart)->ifls, 0 << UART_UARTIFLS_RXIFLSEL_LSB,