Check clock switch Reset before configuring

There's a Reset IC in the AFC Board that only releases the clock switch (ADN4604) reset pin only ~140ms after the P1v0GOOD signal goes high

Check clock switch Reset before configuring
There's a Reset IC in the AFC Board that only releases the clock switch (ADN4604) reset pin only ~140ms after the P1v0GOOD signal goes high
acf5b6e9 · Henrique Silva · d1f5fa95 · acf5b6e9 · acf5b6e9
Commit acf5b6e9 authored Feb 29, 2016 by Henrique Silva
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adn4604.c modules/adn4604.c +8 -0

pin_mapping.h port/nxp/lpc17xx/pin_mapping.h +2 -0

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--- a/modules/adn4604.c
+++ b/modules/adn4604.c
@@ -35,8 +35,16 @@ void adn4604_setup(void)
    t_adn_connect_cfg cfg;

    /* Disable UPDATE' pin by pulling it HIGH */
+    gpio_set_pin_dir(GPIO_ADN_UPDATE_PORT, GPIO_ADN_UPDATE_PIN, OUTPUT);
    gpio_set_pin_state( GPIO_ADN_UPDATE_PORT, GPIO_ADN_UPDATE_PIN, HIGH);

+    /* There's a delay circuit in the Reset pin of the clock switch, we must wait until it clears out */
+    gpio_set_pin_dir( GPIO_ADN_RESETN_PORT, GPIO_ADN_RESETN_PIN, INPUT);
+    
+    while( gpio_read_pin( GPIO_ADN_RESETN_PORT, GPIO_ADN_RESETN_PIN ) == 0) {
+        vTaskDelay(50);
+    }
+
    if (i2c_take_by_busid(I2C_BUS_CPU_ID, &i2c_bus_id, (TickType_t)10) == pdFALSE) {
        return;
    }

--- a/port/nxp/lpc17xx/pin_mapping.h
+++ b/port/nxp/lpc17xx/pin_mapping.h
@@ -114,6 +114,8 @@

 #define GPIO_ADN_UPDATE_PORT    1
 #define GPIO_ADN_UPDATE_PIN     26
+#define GPIO_ADN_RESETN_PORT    1
+#define GPIO_ADN_RESETN_PIN     22

 #endif