Diff: Serial485.cpp

Revision:

0:b3faf92ccc5c

diff -r 000000000000 -r b3faf92ccc5c Serial485.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Serial485.cpp	Mon Jun 30 18:34:25 2014 +0000
@@ -0,0 +1,87 @@
+#include "mbed.h"
+#include "Serial485.h"
+#include "fsl_uart_hal.h"
+
+const PinMap Serial485::PinMap_UART_RTS[] = {
+    {PTE3 , UART_1, 3},
+    {PTA3 , UART_0, 2},
+    {PTA17, UART_0, 3},
+    {PTB2 , UART_0, 3},
+    {PTC1 , UART_1, 3},
+    {PTC12, UART_4, 3},
+    {PTC18, UART_3, 3},
+    {PTD0 , UART_2, 3},
+    {PTD4 , UART_0, 3},
+    {NC  ,  NC    , 0}
+};
+
+Serial485::Serial485(PinName tx, PinName rx, PinName rts):
+    RawSerial(tx, rx),
+    rts(rts)
+{
+    if(rts != NC)
+    {
+        //find UART peripheral number
+        uint32_t uart_rts = pinmap_peripheral(rts, PinMap_UART_RTS);
+        if(uart_rts == (uint32_t)NC)
+            error("pinmap not found for peripheral");
+        else
+        {
+            uart_instance = uart_rts;
+            enableRS485();
+        }
+    }
+}
+
+Serial485::~Serial485()
+{
+    if(rts != NC)
+        disableRS485();
+}
+
+void Serial485::enableRS485()
+{
+    uart_hal_configure_transmitter_rts_polarity(uart_instance, 1);
+    uart_hal_enable_transmitter_rts(uart_instance);
+    pinmap_pinout(rts, PinMap_UART_RTS);
+    pin_mode(rts, PullDown);
+}
+
+void Serial485::disableRS485()
+{
+    uart_hal_disable_transmitter_rts(uart_instance);
+    pin_function(rts, 0);
+    pin_mode(rts, PullUp);
+}
+
+void Serial485::set9thBit(uint8_t value)
+{
+    BW_UART_C3_T8(uart_instance, value);
+}
+
+void Serial485::puts9(const uint16_t *data, uint16_t count)
+{
+    while(count-- > 0)
+    {
+        while(!writeable());
+        putc9(*data++);
+    }
+}
+
+void Serial485::putc9(uint16_t data)
+{
+    uart_hal_putchar9(uart_instance, data);
+}
+
+uint16_t Serial485::getc9()
+{
+    uint16_t data;
+    while(!readable());
+    uart_hal_getchar9(uart_instance, &data);
+    return data;
+}
+
+uint32_t Serial485::getBaudRate()
+{
+    return _baud;
+}