shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

Diff: targets/hal/TARGET_Freescale/TARGET_K20D5M/i2c_api.c

Revision:
180:097147d37470
Parent:
178:a873352662d8
Child:
182:242346c42295
--- a/targets/hal/TARGET_Freescale/TARGET_K20D5M/i2c_api.c	Wed May 07 11:30:07 2014 +0100
+++ b/targets/hal/TARGET_Freescale/TARGET_K20D5M/i2c_api.c	Wed May 07 11:45:52 2014 +0100
@@ -68,6 +68,11 @@
 
     pinmap_pinout(sda, PinMap_I2C_SDA);
     pinmap_pinout(scl, PinMap_I2C_SCL);
+    /* enable open drain for I2C pins, only port b available */
+    uint32_t pin_n  = (uint32_t)(sda & 0x7C) >> 2;
+    PORTB->PCR[pin_n] |= PORT_PCR_ODE_MASK;
+    pin_n  = (uint32_t)(scl & 0x7C) >> 2;
+    PORTB->PCR[pin_n] |= PORT_PCR_ODE_MASK;
 }
 
 int i2c_start(i2c_t *obj) {