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code style fix

pull/14030/head
pennam 2021-02-03 14:18:07 +01:00
parent 506390bcf8
commit d968b17e76
1 changed files with 243 additions and 270 deletions
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513
targets/TARGET_STM/TARGET_STM32H7/i2c_device.c
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@ -14,18 +14,18 @@
****************************************************************************** ******************************************************************************
*/ */
#include "i2c_device.h" #include "i2c_device.h"
#include "mbed_assert.h" #include "mbed_assert.h"
#include "mbed_error.h" #include "mbed_error.h"
#include "stm32h7xx_ll_rcc.h" #include "stm32h7xx_ll_rcc.h"
#if DEVICE_I2C #if DEVICE_I2C
/** @defgroup I2C_DEVICE_Private_Constants I2C_DEVICE Private Constants /** @defgroup I2C_DEVICE_Private_Constants I2C_DEVICE Private Constants
* @{ * @{
*/ */
#ifndef I2C_VALID_TIMING_NBR #ifndef I2C_VALID_TIMING_NBR
#define I2C_VALID_TIMING_NBR 128U #define I2C_VALID_TIMING_NBR 128U
#endif #endif
#define I2C_SPEED_FREQ_STANDARD 0U /* 100 kHz */ #define I2C_SPEED_FREQ_STANDARD 0U /* 100 kHz */
#define I2C_SPEED_FREQ_FAST 1U /* 400 kHz */ #define I2C_SPEED_FREQ_FAST 1U /* 400 kHz */
@ -47,28 +47,26 @@
/** @defgroup I2C_DEVICE_Private_Types I2C_DEVICE Private Types /** @defgroup I2C_DEVICE_Private_Types I2C_DEVICE Private Types
* @{ * @{
*/ */
typedef struct typedef struct {
{ uint32_t freq; /* Frequency in Hz */
uint32_t freq; /* Frequency in Hz */ uint32_t freq_min; /* Minimum frequency in Hz */
uint32_t freq_min; /* Minimum frequency in Hz */ uint32_t freq_max; /* Maximum frequency in Hz */
uint32_t freq_max; /* Maximum frequency in Hz */ uint32_t hddat_min; /* Minimum data hold time in ns */
uint32_t hddat_min; /* Minimum data hold time in ns */ uint32_t vddat_max; /* Maximum data valid time in ns */
uint32_t vddat_max; /* Maximum data valid time in ns */ uint32_t sudat_min; /* Minimum data setup time in ns */
uint32_t sudat_min; /* Minimum data setup time in ns */ uint32_t lscl_min; /* Minimum low period of the SCL clock in ns */
uint32_t lscl_min; /* Minimum low period of the SCL clock in ns */ uint32_t hscl_min; /* Minimum high period of SCL clock in ns */
uint32_t hscl_min; /* Minimum high period of SCL clock in ns */ uint32_t trise; /* Rise time in ns */
uint32_t trise; /* Rise time in ns */ uint32_t tfall; /* Fall time in ns */
uint32_t tfall; /* Fall time in ns */ uint32_t dnf; /* Digital noise filter coefficient */
uint32_t dnf; /* Digital noise filter coefficient */
} I2C_Charac_t; } I2C_Charac_t;
typedef struct typedef struct {
{ uint32_t presc; /* Timing prescaler */
uint32_t presc; /* Timing prescaler */ uint32_t tscldel; /* SCL delay */
uint32_t tscldel; /* SCL delay */ uint32_t tsdadel; /* SDA delay */
uint32_t tsdadel; /* SDA delay */ uint32_t sclh; /* SCL high period */
uint32_t sclh; /* SCL high period */ uint32_t scll; /* SCL low period */
uint32_t scll; /* SCL low period */
} I2C_Timings_t; } I2C_Timings_t;
/** /**
* @} * @}
@ -77,50 +75,49 @@ typedef struct
/** @defgroup I2C_DEVICE_Private_Constants I2C_DEVICE Private Constants /** @defgroup I2C_DEVICE_Private_Constants I2C_DEVICE Private Constants
* @{ * @{
*/ */
static const I2C_Charac_t I2C_Charac[] = static const I2C_Charac_t I2C_Charac[] = {
{ [I2C_SPEED_FREQ_STANDARD] =
[I2C_SPEED_FREQ_STANDARD] = {
{ .freq = 100000,
.freq = 100000, .freq_min = 80000,
.freq_min = 80000, .freq_max = 120000,
.freq_max = 120000, .hddat_min = 0,
.hddat_min = 0, .vddat_max = 3450,
.vddat_max = 3450, .sudat_min = 250,
.sudat_min = 250, .lscl_min = 4700,
.lscl_min = 4700, .hscl_min = 4000,
.hscl_min = 4000, .trise = 640,
.trise = 640, .tfall = 20,
.tfall = 20, .dnf = I2C_DIGITAL_FILTER_COEF,
.dnf = I2C_DIGITAL_FILTER_COEF, },
}, [I2C_SPEED_FREQ_FAST] =
[I2C_SPEED_FREQ_FAST] = {
{ .freq = 400000,
.freq = 400000, .freq_min = 320000,
.freq_min = 320000, .freq_max = 480000,
.freq_max = 480000, .hddat_min = 0,
.hddat_min = 0, .vddat_max = 900,
.vddat_max = 900, .sudat_min = 100,
.sudat_min = 100, .lscl_min = 1300,
.lscl_min = 1300, .hscl_min = 600,
.hscl_min = 600, .trise = 250,
.trise = 250, .tfall = 100,
.tfall = 100, .dnf = I2C_DIGITAL_FILTER_COEF,
.dnf = I2C_DIGITAL_FILTER_COEF, },
}, [I2C_SPEED_FREQ_FAST_PLUS] =
[I2C_SPEED_FREQ_FAST_PLUS] = {
{ .freq = 1000000,
.freq = 1000000, .freq_min = 800000,
.freq_min = 800000, .freq_max = 1200000,
.freq_max = 1200000, .hddat_min = 0,
.hddat_min = 0, .vddat_max = 450,
.vddat_max = 450, .sudat_min = 50,
.sudat_min = 50, .lscl_min = 500,
.lscl_min = 500, .hscl_min = 260,
.hscl_min = 260, .trise = 60,
.trise = 60, .tfall = 100,
.tfall = 100, .dnf = I2C_DIGITAL_FILTER_COEF,
.dnf = I2C_DIGITAL_FILTER_COEF, },
},
}; };
/** /**
* @} * @}
@ -146,77 +143,68 @@ static uint32_t I2c_valid_timing_nbr = 0;
*/ */
static void I2C_Compute_PRESC_SCLDEL_SDADEL(uint32_t clock_src_freq, uint32_t I2C_speed) static void I2C_Compute_PRESC_SCLDEL_SDADEL(uint32_t clock_src_freq, uint32_t I2C_speed)
{ {
uint32_t prev_presc = I2C_PRESC_MAX; uint32_t prev_presc = I2C_PRESC_MAX;
uint32_t ti2cclk; uint32_t ti2cclk;
int32_t tsdadel_min, tsdadel_max; int32_t tsdadel_min, tsdadel_max;
int32_t tscldel_min; int32_t tscldel_min;
uint32_t presc, scldel, sdadel; uint32_t presc, scldel, sdadel;
uint32_t tafdel_min, tafdel_max; uint32_t tafdel_min, tafdel_max;
ti2cclk = (SEC2NSEC + (clock_src_freq / 2U))/ clock_src_freq; ti2cclk = (SEC2NSEC + (clock_src_freq / 2U)) / clock_src_freq;
tafdel_min = (I2C_USE_ANALOG_FILTER == 1U) ? I2C_ANALOG_FILTER_DELAY_MIN : 0U; tafdel_min = (I2C_USE_ANALOG_FILTER == 1U) ? I2C_ANALOG_FILTER_DELAY_MIN : 0U;
tafdel_max = (I2C_USE_ANALOG_FILTER == 1U) ? I2C_ANALOG_FILTER_DELAY_MAX : 0U; tafdel_max = (I2C_USE_ANALOG_FILTER == 1U) ? I2C_ANALOG_FILTER_DELAY_MAX : 0U;
/* tDNF = DNF x tI2CCLK /* tDNF = DNF x tI2CCLK
tPRESC = (PRESC+1) x tI2CCLK tPRESC = (PRESC+1) x tI2CCLK
SDADEL >= {tf +tHD;DAT(min) - tAF(min) - tDNF - [3 x tI2CCLK]} / {tPRESC} SDADEL >= {tf +tHD;DAT(min) - tAF(min) - tDNF - [3 x tI2CCLK]} / {tPRESC}
SDADEL <= {tVD;DAT(max) - tr - tAF(max) - tDNF- [4 x tI2CCLK]} / {tPRESC} */ SDADEL <= {tVD;DAT(max) - tr - tAF(max) - tDNF- [4 x tI2CCLK]} / {tPRESC} */
tsdadel_min = (int32_t)I2C_Charac[I2C_speed].tfall + (int32_t)I2C_Charac[I2C_speed].hddat_min - tsdadel_min = (int32_t)I2C_Charac[I2C_speed].tfall + (int32_t)I2C_Charac[I2C_speed].hddat_min -
(int32_t)tafdel_min - (int32_t)(((int32_t)I2C_Charac[I2C_speed].dnf + 3) * (int32_t)ti2cclk); (int32_t)tafdel_min - (int32_t)(((int32_t)I2C_Charac[I2C_speed].dnf + 3) * (int32_t)ti2cclk);
tsdadel_max = (int32_t)I2C_Charac[I2C_speed].vddat_max - (int32_t)I2C_Charac[I2C_speed].trise - tsdadel_max = (int32_t)I2C_Charac[I2C_speed].vddat_max - (int32_t)I2C_Charac[I2C_speed].trise -
(int32_t)tafdel_max - (int32_t)(((int32_t)I2C_Charac[I2C_speed].dnf + 4) * (int32_t)ti2cclk); (int32_t)tafdel_max - (int32_t)(((int32_t)I2C_Charac[I2C_speed].dnf + 4) * (int32_t)ti2cclk);
/* {[tr+ tSU;DAT(min)] / [tPRESC]} - 1 <= SCLDEL */ /* {[tr+ tSU;DAT(min)] / [tPRESC]} - 1 <= SCLDEL */
tscldel_min = (int32_t)I2C_Charac[I2C_speed].trise + (int32_t)I2C_Charac[I2C_speed].sudat_min; tscldel_min = (int32_t)I2C_Charac[I2C_speed].trise + (int32_t)I2C_Charac[I2C_speed].sudat_min;
if (tsdadel_min <= 0) if (tsdadel_min <= 0) {
{ tsdadel_min = 0;
tsdadel_min = 0; }
}
if (tsdadel_max <= 0) {
if (tsdadel_max <= 0) tsdadel_max = 0;
{ }
tsdadel_max = 0;
} for (presc = 0; presc < I2C_PRESC_MAX; presc++) {
for (scldel = 0; scldel < I2C_SCLDEL_MAX; scldel++) {
for (presc = 0; presc < I2C_PRESC_MAX; presc++) /* TSCLDEL = (SCLDEL+1) * (PRESC+1) * TI2CCLK */
{ uint32_t tscldel = (scldel + 1U) * (presc + 1U) * ti2cclk;
for (scldel = 0; scldel < I2C_SCLDEL_MAX; scldel++)
{ if (tscldel >= (uint32_t)tscldel_min) {
/* TSCLDEL = (SCLDEL+1) * (PRESC+1) * TI2CCLK */ for (sdadel = 0; sdadel < I2C_SDADEL_MAX; sdadel++) {
uint32_t tscldel = (scldel + 1U) * (presc + 1U) * ti2cclk; /* TSDADEL = SDADEL * (PRESC+1) * TI2CCLK */
uint32_t tsdadel = (sdadel * (presc + 1U)) * ti2cclk;
if (tscldel >= (uint32_t)tscldel_min)
{ if ((tsdadel >= (uint32_t)tsdadel_min) && (tsdadel <= (uint32_t)tsdadel_max)) {
for (sdadel = 0; sdadel < I2C_SDADEL_MAX; sdadel++) if (presc != prev_presc) {
{ I2c_valid_timing[I2c_valid_timing_nbr].presc = presc;
/* TSDADEL = SDADEL * (PRESC+1) * TI2CCLK */ I2c_valid_timing[I2c_valid_timing_nbr].tscldel = scldel;
uint32_t tsdadel = (sdadel * (presc + 1U)) * ti2cclk; I2c_valid_timing[I2c_valid_timing_nbr].tsdadel = sdadel;
prev_presc = presc;
if ((tsdadel >= (uint32_t)tsdadel_min) && (tsdadel <= (uint32_t)tsdadel_max)) I2c_valid_timing_nbr ++;
{
if(presc != prev_presc) if (I2c_valid_timing_nbr >= I2C_VALID_TIMING_NBR) {
{ return;
I2c_valid_timing[I2c_valid_timing_nbr].presc = presc; }
I2c_valid_timing[I2c_valid_timing_nbr].tscldel = scldel; }
I2c_valid_timing[I2c_valid_timing_nbr].tsdadel = sdadel; }
prev_presc = presc; }
I2c_valid_timing_nbr ++; }
}
if(I2c_valid_timing_nbr >= I2C_VALID_TIMING_NBR)
{
return;
}
}
}
}
}
} }
}
} }
/** /**
@ -225,77 +213,70 @@ static void I2C_Compute_PRESC_SCLDEL_SDADEL(uint32_t clock_src_freq, uint32_t I2
* @param I2C_speed I2C frequency (index). * @param I2C_speed I2C frequency (index).
* @retval config index (0 to I2C_VALID_TIMING_NBR], 0xFFFFFFFF for no valid config. * @retval config index (0 to I2C_VALID_TIMING_NBR], 0xFFFFFFFF for no valid config.
*/ */
static uint32_t I2C_Compute_SCLL_SCLH (uint32_t clock_src_freq, uint32_t I2C_speed) static uint32_t I2C_Compute_SCLL_SCLH(uint32_t clock_src_freq, uint32_t I2C_speed)
{ {
uint32_t ret = 0xFFFFFFFFU; uint32_t ret = 0xFFFFFFFFU;
uint32_t ti2cclk; uint32_t ti2cclk;
uint32_t ti2cspeed; uint32_t ti2cspeed;
uint32_t prev_error; uint32_t prev_error;
uint32_t dnf_delay; uint32_t dnf_delay;
uint32_t clk_min, clk_max; uint32_t clk_min, clk_max;
uint32_t scll, sclh; uint32_t scll, sclh;
uint32_t tafdel_min; uint32_t tafdel_min;
ti2cclk = (SEC2NSEC + (clock_src_freq / 2U))/ clock_src_freq; ti2cclk = (SEC2NSEC + (clock_src_freq / 2U)) / clock_src_freq;
ti2cspeed = (SEC2NSEC + (I2C_Charac[I2C_speed].freq / 2U))/ I2C_Charac[I2C_speed].freq; ti2cspeed = (SEC2NSEC + (I2C_Charac[I2C_speed].freq / 2U)) / I2C_Charac[I2C_speed].freq;
tafdel_min = (I2C_USE_ANALOG_FILTER == 1U) ? I2C_ANALOG_FILTER_DELAY_MIN : 0U; tafdel_min = (I2C_USE_ANALOG_FILTER == 1U) ? I2C_ANALOG_FILTER_DELAY_MIN : 0U;
/* tDNF = DNF x tI2CCLK */ /* tDNF = DNF x tI2CCLK */
dnf_delay = I2C_Charac[I2C_speed].dnf * ti2cclk; dnf_delay = I2C_Charac[I2C_speed].dnf * ti2cclk;
clk_max = SEC2NSEC / I2C_Charac[I2C_speed].freq_min; clk_max = SEC2NSEC / I2C_Charac[I2C_speed].freq_min;
clk_min = SEC2NSEC / I2C_Charac[I2C_speed].freq_max; clk_min = SEC2NSEC / I2C_Charac[I2C_speed].freq_max;
prev_error = ti2cspeed; prev_error = ti2cspeed;
for (uint32_t count = 0; count < I2c_valid_timing_nbr; count++) for (uint32_t count = 0; count < I2c_valid_timing_nbr; count++) {
{ /* tPRESC = (PRESC+1) x tI2CCLK*/
/* tPRESC = (PRESC+1) x tI2CCLK*/ uint32_t tpresc = (I2c_valid_timing[count].presc + 1U) * ti2cclk;
uint32_t tpresc = (I2c_valid_timing[count].presc + 1U) * ti2cclk;
for (scll = 0; scll < I2C_SCLL_MAX; scll++) for (scll = 0; scll < I2C_SCLL_MAX; scll++) {
{ /* tLOW(min) <= tAF(min) + tDNF + 2 x tI2CCLK + [(SCLL+1) x tPRESC ] */
/* tLOW(min) <= tAF(min) + tDNF + 2 x tI2CCLK + [(SCLL+1) x tPRESC ] */ uint32_t tscl_l = tafdel_min + dnf_delay + (2U * ti2cclk) + ((scll + 1U) * tpresc);
uint32_t tscl_l = tafdel_min + dnf_delay + (2U * ti2cclk) + ((scll + 1U) * tpresc);
/* The I2CCLK period tI2CCLK must respect the following conditions: /* The I2CCLK period tI2CCLK must respect the following conditions:
tI2CCLK < (tLOW - tfilters) / 4 and tI2CCLK < tHIGH */ tI2CCLK < (tLOW - tfilters) / 4 and tI2CCLK < tHIGH */
if ((tscl_l > I2C_Charac[I2C_speed].lscl_min) && (ti2cclk < ((tscl_l - tafdel_min - dnf_delay) / 4U))) if ((tscl_l > I2C_Charac[I2C_speed].lscl_min) && (ti2cclk < ((tscl_l - tafdel_min - dnf_delay) / 4U))) {
{ for (sclh = 0; sclh < I2C_SCLH_MAX; sclh++) {
for (sclh = 0; sclh < I2C_SCLH_MAX; sclh++) /* tHIGH(min) <= tAF(min) + tDNF + 2 x tI2CCLK + [(SCLH+1) x tPRESC] */
{ uint32_t tscl_h = tafdel_min + dnf_delay + (2U * ti2cclk) + ((sclh + 1U) * tpresc);
/* tHIGH(min) <= tAF(min) + tDNF + 2 x tI2CCLK + [(SCLH+1) x tPRESC] */
uint32_t tscl_h = tafdel_min + dnf_delay + (2U * ti2cclk) + ((sclh + 1U) * tpresc);
/* tSCL = tf + tLOW + tr + tHIGH */ /* tSCL = tf + tLOW + tr + tHIGH */
uint32_t tscl = tscl_l + tscl_h + I2C_Charac[I2C_speed].trise + I2C_Charac[I2C_speed].tfall; uint32_t tscl = tscl_l + tscl_h + I2C_Charac[I2C_speed].trise + I2C_Charac[I2C_speed].tfall;
if ((tscl >= clk_min) && (tscl <= clk_max) && (tscl_h >= I2C_Charac[I2C_speed].hscl_min) && (ti2cclk < tscl_h)) if ((tscl >= clk_min) && (tscl <= clk_max) && (tscl_h >= I2C_Charac[I2C_speed].hscl_min) && (ti2cclk < tscl_h)) {
{ int32_t error = (int32_t)tscl - (int32_t)ti2cspeed;
int32_t error = (int32_t)tscl - (int32_t)ti2cspeed;
if (error < 0) if (error < 0) {
{ error = -error;
error = -error; }
/* look for the timings with the lowest clock error */
if ((uint32_t)error < prev_error) {
prev_error = (uint32_t)error;
I2c_valid_timing[count].scll = scll;
I2c_valid_timing[count].sclh = sclh;
ret = count;
}
}
}
} }
/* look for the timings with the lowest clock error */
if ((uint32_t)error < prev_error)
{
prev_error = (uint32_t)error;
I2c_valid_timing[count].scll = scll;
I2c_valid_timing[count].sclh = sclh;
ret = count;
}
}
} }
}
} }
}
return ret; return ret;
} }
/** /**
@ -306,35 +287,31 @@ static uint32_t I2C_Compute_SCLL_SCLH (uint32_t clock_src_freq, uint32_t I2C_spe
*/ */
static uint32_t I2C_ComputeTiming(uint32_t clock_src_freq, uint32_t i2c_freq) static uint32_t I2C_ComputeTiming(uint32_t clock_src_freq, uint32_t i2c_freq)
{ {
uint32_t ret = 0; uint32_t ret = 0;
uint32_t speed; uint32_t speed;
uint32_t idx; uint32_t idx;
if((clock_src_freq != 0U) && (i2c_freq != 0U)) if ((clock_src_freq != 0U) && (i2c_freq != 0U)) {
{ for (speed = 0 ; speed <= (uint32_t)I2C_SPEED_FREQ_FAST_PLUS ; speed++) {
for ( speed = 0 ; speed <= (uint32_t)I2C_SPEED_FREQ_FAST_PLUS ; speed++) if ((i2c_freq >= I2C_Charac[speed].freq_min) &&
{ (i2c_freq <= I2C_Charac[speed].freq_max)) {
if ((i2c_freq >= I2C_Charac[speed].freq_min) && I2C_Compute_PRESC_SCLDEL_SDADEL(clock_src_freq, speed);
(i2c_freq <= I2C_Charac[speed].freq_max)) idx = I2C_Compute_SCLL_SCLH(clock_src_freq, speed);
{
I2C_Compute_PRESC_SCLDEL_SDADEL(clock_src_freq, speed);
idx = I2C_Compute_SCLL_SCLH(clock_src_freq, speed);
if (idx < I2C_VALID_TIMING_NBR) if (idx < I2C_VALID_TIMING_NBR) {
{ ret = ((I2c_valid_timing[idx].presc & 0x0FU) << 28) | \
ret = ((I2c_valid_timing[idx].presc & 0x0FU) << 28) |\ ((I2c_valid_timing[idx].tscldel & 0x0FU) << 20) | \
((I2c_valid_timing[idx].tscldel & 0x0FU) << 20) |\ ((I2c_valid_timing[idx].tsdadel & 0x0FU) << 16) | \
((I2c_valid_timing[idx].tsdadel & 0x0FU) << 16) |\ ((I2c_valid_timing[idx].sclh & 0xFFU) << 8) | \
((I2c_valid_timing[idx].sclh & 0xFFU) << 8) |\ ((I2c_valid_timing[idx].scll & 0xFFU) << 0);
((I2c_valid_timing[idx].scll & 0xFFU) << 0); }
break;
}
} }
break;
}
} }
}
return ret; return ret;
} }
/** /**
@ -344,62 +321,58 @@ static uint32_t I2C_ComputeTiming(uint32_t clock_src_freq, uint32_t i2c_freq)
*/ */
static uint32_t I2C_GetPclk(I2CName i2c) static uint32_t I2C_GetPclk(I2CName i2c)
{ {
uint32_t clocksource; uint32_t clocksource;
uint32_t pclk = 0; uint32_t pclk = 0;
PLL3_ClocksTypeDef pll3_clocks; PLL3_ClocksTypeDef pll3_clocks;
if(i2c == I2C_1 || i2c == I2C_2 || i2c == I2C_3) { if (i2c == I2C_1 || i2c == I2C_2 || i2c == I2C_3) {
clocksource = __HAL_RCC_GET_I2C123_SOURCE(); clocksource = __HAL_RCC_GET_I2C123_SOURCE();
switch(clocksource) switch (clocksource) {
{ case RCC_I2C123CLKSOURCE_D2PCLK1:
case RCC_I2C123CLKSOURCE_D2PCLK1: pclk = HAL_RCC_GetPCLK1Freq();
pclk = HAL_RCC_GetPCLK1Freq(); break;
break; case RCC_I2C123CLKSOURCE_PLL3:
case RCC_I2C123CLKSOURCE_PLL3: HAL_RCCEx_GetPLL3ClockFreq(&pll3_clocks);
HAL_RCCEx_GetPLL3ClockFreq(&pll3_clocks); pclk = pll3_clocks.PLL3_R_Frequency;
pclk = pll3_clocks.PLL3_R_Frequency; break;
break; case RCC_I2C123CLKSOURCE_HSI:
case RCC_I2C123CLKSOURCE_HSI: pclk = HSI_VALUE;
pclk = HSI_VALUE; break;
break; case RCC_I2C123CLKSOURCE_CSI:
case RCC_I2C123CLKSOURCE_CSI: pclk = CSI_VALUE;
pclk = CSI_VALUE; break;
break; default:
default: // should not happend
error("I2C123: Invalid clock source");
break;
}
} else if (i2c == I2C_4) {
clocksource = __HAL_RCC_GET_I2C4_SOURCE();
switch (clocksource) {
case RCC_I2C4CLKSOURCE_D3PCLK1:
pclk = HAL_RCCEx_GetD3PCLK1Freq();
break;
case RCC_I2C4CLKSOURCE_PLL3:
HAL_RCCEx_GetPLL3ClockFreq(&pll3_clocks);
pclk = pll3_clocks.PLL3_R_Frequency;
break;
case RCC_I2C4CLKSOURCE_HSI:
pclk = HSI_VALUE;
break;
case RCC_I2C4CLKSOURCE_CSI:
pclk = CSI_VALUE;
break;
default:
// should not happend
error("I2C4: Invalid clock source");
break;
}
} else {
// should not happend // should not happend
error("I2C123: Invalid clock source"); error("I2C: unknown instance");
break;
} }
}
else if(i2c == I2C_4) {
clocksource = __HAL_RCC_GET_I2C4_SOURCE();
switch(clocksource)
{
case RCC_I2C4CLKSOURCE_D3PCLK1:
pclk = HAL_RCCEx_GetD3PCLK1Freq();
break;
case RCC_I2C4CLKSOURCE_PLL3:
HAL_RCCEx_GetPLL3ClockFreq(&pll3_clocks);
pclk = pll3_clocks.PLL3_R_Frequency;
break;
case RCC_I2C4CLKSOURCE_HSI:
pclk = HSI_VALUE;
break;
case RCC_I2C4CLKSOURCE_CSI:
pclk = CSI_VALUE;
break;
default:
// should not happend
error("I2C4: Invalid clock source");
break;
}
}
else {
// should not happend
error("I2C: unknown instance");
}
return pclk; return pclk;
} }
/** /**
* @} * @}
@ -415,16 +388,16 @@ static uint32_t I2C_GetPclk(I2CName i2c)
*/ */
uint32_t get_i2c_timing(I2CName i2c, int hz) uint32_t get_i2c_timing(I2CName i2c, int hz)
{ {
uint32_t tim; uint32_t tim;
uint32_t pclk; uint32_t pclk;
I2c_valid_timing_nbr = 0; I2c_valid_timing_nbr = 0;
pclk = I2C_GetPclk(i2c); pclk = I2C_GetPclk(i2c);
tim = I2C_ComputeTiming(pclk, hz); tim = I2C_ComputeTiming(pclk, hz);
return tim; return tim;
} }
/** /**
* @} * @}