From 343042d9d25a80a47d6ba10026d66987a7db3256 Mon Sep 17 00:00:00 2001
From: Fabio Utzig <utzig@utzig.org>
Date: Fri, 15 May 2015 21:08:53 -0300
Subject: Add tx/rx pin configuration to SerialConfig

---
 os/hal/ports/NRF51/NRF51822/serial_lld.c | 22 ++++++++++++++--------
 os/hal/ports/NRF51/NRF51822/serial_lld.h |  2 ++
 2 files changed, 16 insertions(+), 8 deletions(-)

(limited to 'os/hal/ports')

diff --git a/os/hal/ports/NRF51/NRF51822/serial_lld.c b/os/hal/ports/NRF51/NRF51822/serial_lld.c
index ea687c8..1783b92 100644
--- a/os/hal/ports/NRF51/NRF51822/serial_lld.c
+++ b/os/hal/ports/NRF51/NRF51822/serial_lld.c
@@ -33,6 +33,7 @@
 /*===========================================================================*/
 
 #define INVALID_BAUDRATE 0xFFFFFFFF
+#define INVALID_PIN      0xFF
 
 /*===========================================================================*/
 /* Driver exported variables.                                                */
@@ -51,7 +52,9 @@ SerialDriver SD1;
  * @brief   Driver default configuration.
  */
 static const SerialConfig default_config = {
-  38400
+  .speed = 38400,
+  .tx_pin = INVALID_PIN,
+  .rx_pin = INVALID_PIN,
 };
 
 /*===========================================================================*/
@@ -131,8 +134,7 @@ OSAL_IRQ_HANDLER(Vector48) {
     osalSysUnlockFromISR();
   }
 
-  //TODO
-  //NRF_UART0->EVENTS_ERROR = 0;
+  /* TODO: Error handling for EVENTS_ERROR */
 
   OSAL_IRQ_EPILOGUE();
 }
@@ -176,15 +178,19 @@ void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
     if (sdp == &SD1) {
       uint32_t regval;
 
-      /* FIXME: some board specific, some hardcodeds! */
+      /* TODO: Add support for CTS/RTS! */
 
       /* Configure PINs */
       NRF_UART0->PSELRTS = ~0;
       NRF_UART0->PSELCTS = ~0;
-
-      NRF_GPIO->PIN_CNF[9] = 1;
-      NRF_UART0->PSELTXD = 9;
-      NRF_UART0->PSELRXD = 11;
+      if (config->tx_pin != INVALID_PIN) {
+        palSetPadMode(IOPORT1, config->tx_pin, PAL_MODE_OUTPUT_PUSHPULL);
+        NRF_UART0->PSELTXD = config->tx_pin;
+      }
+      if (config->rx_pin != INVALID_PIN) {
+        palSetPadMode(IOPORT1, config->rx_pin, PAL_MODE_INPUT);
+        NRF_UART0->PSELRXD = config->rx_pin;
+      }
 
       regval = regval_from_baudrate(config->speed);
       osalDbgAssert(regval != INVALID_BAUDRATE, "invalid baudrate speed");
diff --git a/os/hal/ports/NRF51/NRF51822/serial_lld.h b/os/hal/ports/NRF51/NRF51822/serial_lld.h
index b7b1beb..62f1302 100644
--- a/os/hal/ports/NRF51/NRF51822/serial_lld.h
+++ b/os/hal/ports/NRF51/NRF51822/serial_lld.h
@@ -71,6 +71,8 @@ typedef struct {
    */
   uint32_t                  speed;
   /* End of the mandatory fields.*/
+  uint8_t                   tx_pin;
+  uint8_t                   rx_pin;
 } SerialConfig;
 
 /**
-- 
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