[GitHub] mkiiskila closed pull request #670: MYNEWT-865; flush RXD if needed before starting read operation.

[GitBox <gi...@apache.org>]

mkiiskila closed pull request #670: MYNEWT-865; flush RXD if needed before starting read operation.
URL: https://github.com/apache/mynewt-core/pull/670
 
 
   

This is a PR merged from a forked repository.
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As this is a foreign pull request (from a fork), the diff is supplied
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diff --git a/hw/mcu/nordic/nrf52xxx/src/hal_i2c.c b/hw/mcu/nordic/nrf52xxx/src/hal_i2c.c
index bd8781aa4..85b54e0c4 100644
--- a/hw/mcu/nordic/nrf52xxx/src/hal_i2c.c
+++ b/hw/mcu/nordic/nrf52xxx/src/hal_i2c.c
@@ -160,7 +160,7 @@ __ASM volatile (
  * This should reset state from (most of) the devices on the other end.
  */
 static void
-hal_i2c_clear_bus(struct nrf52_hal_i2c_cfg *cfg)
+hal_i2c_clear_bus(const struct nrf52_hal_i2c_cfg *cfg)
 {
     int i;
 
@@ -321,6 +321,13 @@ hal_i2c_master_read(uint8_t i2c_num, struct hal_i2c_master_data *pdata,
 
     start = os_time_get();
 
+    if (regs->EVENTS_RXDREADY) {
+        /*
+         * If previous read was interrupted, flush RXD.
+         */
+        (void)regs->RXD;
+        (void)regs->RXD;
+    }
     regs->EVENTS_ERROR = 0;
     regs->EVENTS_STOPPED = 0;
     regs->EVENTS_SUSPENDED = 0;


 

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