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stm32l4: add I2C timings for 48 MHz SYSCLK

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This commit is contained in:
Matias Nitsche 2020-06-07 15:12:51 -03:00 committed by Alan Carvalho de Assis
parent fa97e216e4
commit b7d18585dc
1 changed files with 34 additions and 5 deletions
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39
arch/arm/src/stm32l4/stm32l4_i2c.c
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@ -1288,11 +1288,11 @@ static void stm32l4_i2c_setclock(FAR struct stm32l4_i2c_priv_s *priv,
{
int i2cclk_mhz;
uint32_t pe;
uint8_t presc;
uint8_t scl_delay;
uint8_t sda_delay;
uint8_t scl_h_period;
uint8_t scl_l_period;
uint8_t presc = 0;
uint8_t scl_delay = 0;
uint8_t sda_delay = 0;
uint8_t scl_h_period = 0;
uint8_t scl_l_period = 0;
if (frequency != priv->frequency)
{
@ -1306,6 +1306,8 @@ static void stm32l4_i2c_setclock(FAR struct stm32l4_i2c_priv_s *priv,
#if defined(STM32L4_I2C_USE_HSI16) || (STM32L4_PCLK1_FREQUENCY == 16000000)
i2cclk_mhz = 16;
#elif STM32L4_PCLK1_FREQUENCY == 48000000
i2cclk_mhz = 48;
#elif STM32L4_PCLK1_FREQUENCY == 80000000
i2cclk_mhz = 80;
#elif STM32L4_PCLK1_FREQUENCY == 120000000
@ -1457,6 +1459,33 @@ static void stm32l4_i2c_setclock(FAR struct stm32l4_i2c_priv_s *priv,
scl_l_period = 162;
}
}
else if (i2cclk_mhz == 48)
{
if (frequency == 100000)
{
presc = 2;
scl_delay = 10;
sda_delay = 0;
scl_h_period = 62;
scl_l_period = 85;
}
else if (frequency == 400000)
{
presc = 1;
scl_delay = 8;
sda_delay = 0;
scl_h_period = 12;
scl_l_period = 33;
}
else if (frequency == 1000000)
{
presc = 0;
scl_delay = 5;
sda_delay = 0;
scl_h_period = 8;
scl_l_period = 22;
}
}
else
{
DEBUGPANIC();