From 5fee893778fad0d2b1a17e812aa0331f81a3ba7a Mon Sep 17 00:00:00 2001
From: Stephane D'Alu <sdalu@sdalu.com>
Date: Wed, 29 Jun 2016 12:26:22 +0200
Subject: conditionally include support for LED

---
 os/hal/ports/NRF51/NRF51822/hal_qei_lld.c | 10 +++++++++-
 os/hal/ports/NRF51/NRF51822/hal_qei_lld.h | 14 +++++++++++++-
 2 files changed, 22 insertions(+), 2 deletions(-)

(limited to 'os')

diff --git a/os/hal/ports/NRF51/NRF51822/hal_qei_lld.c b/os/hal/ports/NRF51/NRF51822/hal_qei_lld.c
index f74f5f7..ffbed95 100644
--- a/os/hal/ports/NRF51/NRF51822/hal_qei_lld.c
+++ b/os/hal/ports/NRF51/NRF51822/hal_qei_lld.c
@@ -199,9 +199,11 @@ void qei_lld_start(QEIDriver *qeip) {
     // Set Pins
     palSetLineMode(cfg->phase_a, PAL_MODE_INPUT);
     palSetLineMode(cfg->phase_b, PAL_MODE_INPUT);
+#if NRF51_QEI_USE_LED == TRUE
     if (cfg->led != PAL_NOLINE) {
 	palSetLineMode(cfg->led, PAL_MODE_INPUT);
     }
+#endif
       
     // Set interrupt masks and enable interrupt
     qdec->INTENSET = QDEC_INTENSET_REPORTRDY_Msk |
@@ -217,13 +219,17 @@ void qei_lld_start(QEIDriver *qeip) {
     qdec->PSELB      = PAL_PAD(cfg->phase_b);
 
     // Select (optional) pin for LED, and configure it
+#if NRF51_QEI_USE_LED == TRUE
     qdec->PSELLED    = PAL_PAD(cfg->led);
     qdec->LEDPOL     = ((cfg->led_polarity == QEI_LED_POLARITY_LOW)
                          ? QDEC_LEDPOL_LEDPOL_ActiveLow 
 		         : QDEC_LEDPOL_LEDPOL_ActiveHigh)
                        << QDEC_LEDPOL_LEDPOL_Pos; 
     qdec->LEDPRE     = cfg->led_warming;
-
+#else
+    qdec->PSELLED    = (uint32_t)-1;
+#endif
+    
     // Set sampling resolution and debouncing
     qdec->SAMPLEPER  = cfg->resolution;
     qdec->DBFEN      = (cfg->debouncing ? QDEC_DBFEN_DBFEN_Enabled
@@ -272,9 +278,11 @@ void qei_lld_stop(QEIDriver *qeip) {
     // Return pins to reset state
     palSetLineMode(cfg->phase_a, PAL_MODE_RESET);
     palSetLineMode(cfg->phase_b, PAL_MODE_RESET);
+#if NRF51_QEI_USE_LED == TRUE
     if (cfg->led != PAL_NOLINE) {
 	palSetLineMode(cfg->led, PAL_MODE_RESET);
     }
+#endif
   }
 }
 
diff --git a/os/hal/ports/NRF51/NRF51822/hal_qei_lld.h b/os/hal/ports/NRF51/NRF51822/hal_qei_lld.h
index f8f29b9..e1485e3 100644
--- a/os/hal/ports/NRF51/NRF51822/hal_qei_lld.h
+++ b/os/hal/ports/NRF51/NRF51822/hal_qei_lld.h
@@ -51,6 +51,16 @@
  * @name    Configuration options
  * @{
  */
+/**
+ * @brief   LED control enable switch.
+ * @details If set to @p TRUE the support for LED control
+ *          is included.
+ * @note    The default is @p FALSE.
+ */
+#if !defined(NRF51_QEI_USE_LED) || defined(__DOXYGEN__)
+#define NRF51_QEI_USE_LED                   FALSE
+#endif
+
 /**
  * @brief   QEID1 driver enable switch.
  * @details If set to @p TRUE the support for QEID1 is included.
@@ -217,8 +227,9 @@ typedef struct {
    * @brief   Line for reading Phase B
    */
   ioline_t                  phase_b;
+#if (NRF51_QEI_USE_LED == TRUE) || defined(__DOXYGEN__)
   /**
-   * @brief   Line to use to control LED
+   * @brief   Line used to control LED
    *
    * @note    If LED is not controlled by MCU, you need to use the 
    *          PAL_NOLINE value.
@@ -239,6 +250,7 @@ typedef struct {
    * @brief   LED polarity to used (when LED is controlled by MCU) 
    */
   uint8_t                   led_polarity;
+#endif
    /**
     * @brief  Activate debouncing filter
     *
-- 
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