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adding back tx fifo, this also fixes the tx interrupts

pull/195/head
mazgch 2014-03-03 12:00:32 +01:00
parent f77045e9e7
commit ca1d76687b
1 changed files with 9 additions and 4 deletions
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13
libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c
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@ -76,7 +76,7 @@ serial_t stdio_uart;
struct serial_global_data_s {
uint32_t serial_irq_id;
gpio_t sw_rts, sw_cts;
uint8_t rx_irq_set_flow, rx_irq_set_api;
uint8_t count, rx_irq_set_flow, rx_irq_set_api;
};
static struct serial_global_data_s uart_data[UART_NUM];
@ -357,6 +357,7 @@ int serial_getc(serial_t *obj) {
void serial_putc(serial_t *obj, int c) {
while (!serial_writable(obj));
obj->uart->THR = c;
uart_data[obj->index].count++;
}
int serial_readable(serial_t *obj) {
@ -366,9 +367,13 @@ int serial_readable(serial_t *obj) {
int serial_writable(serial_t *obj) {
int isWritable = 1;
if (NC != uart_data[obj->index].sw_cts.pin)
isWritable = gpio_read(&uart_data[obj->index].sw_cts) == 0;
if (isWritable)
isWritable = obj->uart->LSR & 0x40;
isWritable = (gpio_read(&uart_data[obj->index].sw_cts) == 0) && (obj->uart->LSR & 0x40);
else {
if (obj->uart->LSR & 0x20)
uart_data[obj->index].count = 0;
else if (uart_data[obj->index].count >= 16)
isWritable = 0;
}
return isWritable;
}