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I2C. Added safety checks for different STM32 platforms in frequency settings routine. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3624 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
barthess 2011-12-17 12:45:50 +00:00
parent 3ff51b09a4
commit 27a7716a3b
1 changed files with 18 additions and 3 deletions
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21
os/hal/platforms/STM32/i2c_lld.c
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@ -587,13 +587,28 @@ void i2c_lld_set_clock(I2CDriver *i2cp) {
regCR2 = i2cp->id_i2c->CR2; /* Get the I2Cx CR2 value */
regCR2 &= (uint16_t)~I2C_CR2_FREQ; /* Clear frequency FREQ[5:0] bits */
freq = (uint16_t)(STM32_PCLK1 / 1000000); /* Set frequency bits depending on pclk1 value */
#ifdef STM32F4XX
#if defined(STM32F4XX)
chDbgCheck((freq >= 2) && (freq <= 42),
"i2c_lld_set_clock() : Peripheral clock freq. out of range");
#else
#elif defined(STM32L1XX_MD)
chDbgCheck((freq >= 2) && (freq <= 32),
"i2c_lld_set_clock() : Peripheral clock freq. out of range");
#elif defined(STM32F2XX)
chDbgCheck((freq >= 2) && (freq <= 30),
"i2c_lld_set_clock() : Peripheral clock freq. out of range");
#elif defined(STM32F10X_LD_VL) || defined(STM32F10X_MD_VL) || \
defined(STM32F10X_HD_VL)
chDbgCheck((freq >= 2) && (freq <= 24),
"i2c_lld_set_clock() : Peripheral clock freq. out of range");
#elif defined(STM32F10X_LD) || defined(STM32F10X_MD) || \
defined(STM32F10X_HD) || defined(STM32F10X_XL) || \
defined(STM32F10X_CL)
chDbgCheck((freq >= 2) && (freq <= 36),
"i2c_lld_set_clock() : Peripheral clock freq. out of range");
#endif /* define STM32F4XX */
#else
#error "unspecified, unsupported or invalid STM32 platform"
#endif
regCR2 |= freq;
i2cp->id_i2c->CR2 = regCR2;