From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Wed, 13 Mar 2013 15:25:58 +0000 (+0100)
Subject: Re-init of read index in i2c structure in case i2c_read is called with only write... 
X-Git-Url: http://git.techno-innov.fr/?a=commitdiff_plain;h=29e2760d75a3f1a7a64497387d527fa27d37ef1f;p=soft%2Flpc122x%2Fcore

Re-init of read index in i2c structure in case i2c_read is called with only write operations Comments and indentation
---

diff --git a/drivers/eeprom.c b/drivers/eeprom.c
index 94247fa..027d0d8 100644
--- a/drivers/eeprom.c
+++ b/drivers/eeprom.c
@@ -159,7 +159,7 @@ int eeprom_write(uint32_t offset, const void *buf, size_t count)
 	char full_buff[(EEPROM_ID_MAX_PAGE_SIZE + MAX_CMD_SIZE)];
 	int eeprom_type = get_eeprom_type();
 
-	 switch (eeprom_type) {
+	switch (eeprom_type) {
 		case EEPROM_TYPE_SMALL:
 			cmd_size = CMD_SIZE_SMALL;
 			page_size = EEPROM_ID_SMALL_PAGE_SIZE;
diff --git a/drivers/i2c.c b/drivers/i2c.c
index e629857..8f75684 100644
--- a/drivers/i2c.c
+++ b/drivers/i2c.c
@@ -111,7 +111,9 @@ void I2C_0_Handler(void)
 			break;
 		case 0x10:  /* A repeated START has been transmitted. */
 			/* Setting read_index to 0 is usefull only if next data byte is
-			 *    Slave Address + Read (SLA + R), but it's OK if we will write too. */
+			 *    Slave Address + Read (SLA + R), but it's OK if we perform a write too, and
+			 *    is necessary for read with a null data length used to probe for devices.
+			 */
 			i2c->read_index = 0;
 			/* Send Slave Address and Read/Write bit (SLA + R/W)
 			 * Depending on R/W bit, Master Receive or master Transmit mode will be enterred. */
@@ -254,7 +256,6 @@ void I2C_0_Handler(void)
 
 
 
-
 /***************************************************************************** */
 /*                        I2C access                                           */
 /***************************************************************************** */
@@ -307,6 +308,7 @@ int i2c_read(const void *cmd_buf, size_t cmd_size, const void* ctrl_buf, void* i
 	/* read buffer */
 	mod_i2c.in_buff = inbuff;
 	mod_i2c.read_length = count;
+	mod_i2c.read_index = 0;
 
 	/* Start the process */
 	mod_i2c.state = I2C_BUSY;