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Add an alternate STM32 I2C driver that works around errata in the F103 chip (and maybe others). From Patrizio Simona

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Gregory Nutt
2014-05-14 07:48:47 -06:00
parent 59e254d1f6
commit 6018da5181
4 changed files with 2669 additions and 4 deletions
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arch/arm/include/sam34/chip.h
+4 -4
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@@ -831,10 +831,10 @@
* bits[7:4] of each field, bits[3:0] read as zero and ignore writes.
*/
#define NVIC_SYSH_PRIORITY_MIN 0xf0 /* All bits[7:4] set is minimum priority */
#define NVIC_SYSH_PRIORITY_DEFAULT 0x80 /* Midpoint is the default */
#define NVIC_SYSH_PRIORITY_MAX 0x00 /* Zero is maximum priority */
#define NVIC_SYSH_PRIORITY_STEP 0x10 /* Four bits of interrupt priority used */
#define NVIC_SYSH_PRIORITY_MIN 0xf0 /* All bits[7:4] set is minimum priority */
#define NVIC_SYSH_PRIORITY_DEFAULT 0x80 /* Midpoint is the default */
#define NVIC_SYSH_PRIORITY_MAX 0x00 /* Zero is maximum priority */
#define NVIC_SYSH_PRIORITY_STEP 0x10 /* Four bits of interrupt priority used */
/* If CONFIG_ARMV7M_USEBASEPRI is selected, then interrupts will be disabled
* by setting the BASEPRI register to NVIC_SYSH_DISABLE_PRIORITY so that most