VeniVidiVici
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nvboard
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nvboard: do not call uart_rx_send() if it is idle

This commit is contained in:
Zihao Yu 2024-01-09 03:13:05 +08:00
parent 2e7135fcb6
commit 7007a7b2cc
2 changed files with 8 additions and 2 deletions
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3
src/nvboard.cpp
View File

@ -25,9 +25,10 @@ void nvboard_update() {
if (unlikely(!is_kb_idle)) kb_update();
extern int16_t uart_divisor_cnt;
extern bool is_uart_rx_idle;
if (unlikely((-- uart_divisor_cnt) < 0)) {
uart_tx_receive();
uart_rx_send();
if (unlikely(!is_uart_rx_idle)) uart_rx_send();
}
static uint64_t last = 0;

7
src/uart.cpp
View File

@ -6,6 +6,7 @@
static UART* uart = NULL;
int16_t uart_divisor_cnt = 0;
bool is_uart_rx_idle = true;
UART::UART(SDL_Renderer *rend, int cnt, int init_val, int ct, int x, int y, int w, int h):
@ -63,7 +64,10 @@ void UART::rx_send() {
// the uart_divisor_cnt is maintained in tx_receive()
if (rx_state == 0) { // idle
rx_data = rx_sending_str[0];
if (rx_data == '\0') return;
if (rx_data == '\0') {
is_uart_rx_idle = true;
return;
}
rx_sending_str.erase(0, 1);
pin_poke(UART_RX, 0); // start bit
rx_state ++;
@ -80,6 +84,7 @@ void UART::rx_send() {
void UART::rx_getchar(uint8_t ch) {
if (ch == '\n') {
rx_sending_str += rx_input;
is_uart_rx_idle = false;
rx_term->clear();
rx_term->feed_str(rx_input_prompt);
rx_input = "";