mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

Diff: targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c

Revision:
109:bc5f94f2a67f
Parent:
108:4cb9db2ced35
Child:
113:65a335a675de
--- a/targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c	Mon Mar 03 11:15:08 2014 +0000
+++ b/targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c	Tue Mar 04 10:00:07 2014 +0000
@@ -76,7 +76,7 @@
 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 @@
 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_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);
+    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) {