firmware: add definition for main osc bypass when using external osc
Add new board.h definition BOARD_MAINOSC_BYPASS to configure the clock module to use an external oscillator rather than a crystal. The qmod board is one such board.
Change-Id: If62f55cd4c8b0cf758534f09d25a9bcb028814a7
diff --git a/firmware/libboard/common/source/board_lowlevel.c b/firmware/libboard/common/source/board_lowlevel.c
index 1ddbcba..a04ce10 100644
--- a/firmware/libboard/common/source/board_lowlevel.c
+++ b/firmware/libboard/common/source/board_lowlevel.c
@@ -147,7 +147,7 @@
}
*/
-#ifndef qmod
+#ifndef BOARD_MAINOSC_BYPASS
/* Initialize main oscillator */
if ( !(PMC->CKGR_MOR & CKGR_MOR_MOSCSEL) )
{
@@ -165,11 +165,11 @@
timeout = 0;
while (!(PMC->PMC_SR & PMC_SR_MOSCSELS) && (timeout++ < CLOCK_TIMEOUT));
#else
- /* QMOD has external 12MHz clock source */
+ /* Board has external clock, not a crystal oscillator */
PIOB->PIO_PDR = (1 << 9);
PIOB->PIO_PUDR = (1 << 9);
PIOB->PIO_PPDDR = (1 << 9);
- PMC->CKGR_MOR = CKGR_MOR_KEY(0x37) | CKGR_MOR_MOSCRCEN | CKGR_MOR_MOSCXTBY| CKGR_MOR_MOSCSEL;
+ PMC->CKGR_MOR = CKGR_MOR_KEY(0x37) | CKGR_MOR_MOSCRCEN | CKGR_MOR_MOSCXTBY | CKGR_MOR_MOSCSEL;
#endif
/* disable the red LED after main clock initialization */
diff --git a/firmware/libboard/qmod/include/board.h b/firmware/libboard/qmod/include/board.h
index 6d7d4ff..7ea5bd7 100644
--- a/firmware/libboard/qmod/include/board.h
+++ b/firmware/libboard/qmod/include/board.h
@@ -25,6 +25,8 @@
#define BOARD_MAINOSC 12000000
/** desired main clock frequency (in Hz, based on BOARD_MAINOSC) */
#define BOARD_MCK 58000000 // 18.432 * 29 / 6
+/** board has external clock, not crystal */
+#define BOARD_MAINOSC_BYPASS
/** MCU pin connected to red LED */
#define PIO_LED_RED PIO_PA17
@@ -35,7 +37,7 @@
/** green LED pin definition */
#define PIN_LED_GREEN {PIO_LED_GREEN, PIOA, ID_PIOA, PIO_OUTPUT_1, PIO_DEFAULT}
/** LEDs pin definition */
-#define PINS_LEDS PIN_LED_RED, PIN_LED_GREEN
+#define PINS_LEDS PIN_LED_RED, PIN_LED_GREEN
/** index for red LED in LEDs pin definition array */
#define LED_NUM_RED 0
/** index for green LED in LEDs pin definition array */