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Restore serial_api.c on LPC1768 

Michael's GPIO fix changed this to a previous version, this commit restores
it to the last version.
pull/213/head^2^2
Bogdan Marinescu 2014-03-18 10:53:33 +00:00
parent 6cb99d9bd7
commit c013d6e6a9
1 changed files with 12 additions and 5 deletions
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15
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) {
@ -364,10 +365,16 @@ int serial_readable(serial_t *obj) {
}
int serial_writable(serial_t *obj) {
int isWritable = 1;
if (NC != uart_data[obj->index].sw_cts.pin)
return (gpio_read(&uart_data[obj->index].sw_cts) == 0) && (obj->uart->LSR & 0x40); //If flow control: writable if CTS low + UART done
else
return obj->uart->LSR & 0x20; //No flow control: writable if space in holding register
isWritable = (gpio_read(&uart_data[obj->index].sw_cts) == 0) && (obj->uart->LSR & 0x40); //If flow control: writable if CTS low + UART done
else {
if (obj->uart->LSR & 0x20)
uart_data[obj->index].count = 0;
else if (uart_data[obj->index].count >= 16)
isWritable = 0;
}
return isWritable;
}
void serial_clear(serial_t *obj) {