set address location, reset I2C

[cortex-from-scratch] / include / sys / mmap.h

diff --git a/include/sys/mmap.h b/include/sys/mmap.h
index 4fd043d..a5d2228 100644 (file)
--- a/include/sys/mmap.h
+++ b/include/sys/mmap.h
@@ -54,6 +54,7 @@
 /* SYSTEM CONTROL REGISTER */
 #define SYSCTRL_RCC MEM_ADDR(0x40021000)
 #define RCC_APB1ENR MEM_ADDR(0x4002101C) // register to enable I2C
+#define RCC_APB1RSTR MEM_ADDR(0x40021010) // register to reset I2C
 #define RCC_APB2ENR MEM_ADDR(0x40021018) // register to enable USART1
 
 #define SYSCTRL_RIS MEM_ADDR(0x400FE050)