RTEMS 6.1-rc4
|
Functions | |
void | TC_Configure (Tc *pTc, uint32_t dwChannel, uint32_t dwMode) |
Configures a Timer Counter Channel. | |
void | TC_Start (Tc *pTc, uint32_t dwChannel) |
Reset and Start the TC Channel. | |
void | TC_Stop (Tc *pTc, uint32_t dwChannel) |
Stop TC Channel. | |
uint32_t | TC_FindMckDivisor (uint32_t dwFreq, uint32_t dwMCk, uint32_t *dwDiv, uint32_t *dwTcClks, uint32_t dwBoardMCK) |
Find best MCK divisor. | |
Interface for configuring and using Timer Counter (TC) peripherals.
Implementation of Timer Counter (TC).
void TC_Configure | ( | Tc * | pTc, |
uint32_t | dwChannel, | ||
uint32_t | dwMode | ||
) |
Configures a Timer Counter Channel.
Configures a Timer Counter to operate in the given mode. Timer is stopped after configuration and must be restarted with TC_Start(). All the interrupts of the timer are also disabled.
pTc | Pointer to a Tc instance. |
channel | Channel number. |
mode | Operating mode (TC_CMR value). |
uint32_t TC_FindMckDivisor | ( | uint32_t | dwFreq, |
uint32_t | dwMCk, | ||
uint32_t * | dwDiv, | ||
uint32_t * | dwTcClks, | ||
uint32_t | dwBoardMCK | ||
) |
Find best MCK divisor.
Finds the best MCK divisor given the timer frequency and MCK. The result is guaranteed to satisfy the following equation:
with DIV being the highest possible value.
dwFreq | Desired timer frequency. |
dwMCk | Master clock frequency. |
dwDiv | Divisor value. |
dwTcClks | TCCLKS field value for divisor. |
dwBoardMCK | Board clock frequency. |
void TC_Start | ( | Tc * | pTc, |
uint32_t | dwChannel | ||
) |
Reset and Start the TC Channel.
Enables the timer clock and performs a software reset to start the counting.
pTc | Pointer to a Tc instance. |
dwChannel | Channel number. |