diff options
Diffstat (limited to 'common/soft_i2c.c')
| -rw-r--r-- | common/soft_i2c.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/common/soft_i2c.c b/common/soft_i2c.c index 3d0e08c..bffcd44 100644 --- a/common/soft_i2c.c +++ b/common/soft_i2c.c @@ -39,6 +39,10 @@ /* #define DEBUG_I2C */ +#ifdef DEBUG_I2C +DECLARE_GLOBAL_DATA_PTR; +#endif + /*----------------------------------------------------------------------- * Definitions @@ -53,7 +57,6 @@ #ifdef DEBUG_I2C #define PRINTD(fmt,args...) do { \ - DECLARE_GLOBAL_DATA_PTR; \ if (gd->have_console) \ printf (fmt ,##args); \ } while (0) @@ -164,13 +167,10 @@ static void send_ack(int ack) volatile immap_t *immr = (immap_t *)CFG_IMMR; #endif - I2C_ACTIVE; I2C_SCL(0); I2C_DELAY; - - I2C_SDA(ack); - I2C_ACTIVE; + I2C_SDA(ack); I2C_DELAY; I2C_SCL(1); I2C_DELAY; @@ -288,7 +288,10 @@ int i2c_probe(uchar addr) { int rc; - /* perform 1 byte read transaction */ + /* + * perform 1 byte write transaction with just address byte + * (fake write) + */ send_start(); rc = write_byte ((addr << 1) | 0); send_stop(); |