Function tc_find_mck

Find the best PBA/MCK divisor.

uint32_t tc_find_mck_divisor(
		uint32_t ul_freq,
		uint32_t ul_mck,
		uint32_t * p_uldiv,
		uint32_t * ul_tcclks,
		uint32_t ul_boardmck)

For SAM4L devices: Finds the best PBA divisor given the timer frequency and PBA clock. The result is guaranteed to satisfy the following equation:

(ul_pbaclk / (2* DIV * 65536)) <= freq <= (ul_pbaclk / (2* DIV))

with DIV being the lowest possible value, to maximize timing adjust resolution.

For non SAM4L devices: Finds the best MCK divisor given the timer frequency and MCK. The result is guaranteed to satisfy the following equation:

(MCK / (DIV * 65536)) <= freq <= (MCK / DIV)

with DIV being the lowest possible value, to maximize timing adjust resolution.

Table 1. Parameters
Data direction	Parameter name	Description
[in]	ul_freq	Desired timer frequency
[in]	ul_mck	PBA clock frequency
[out]	p_uldiv	Divisor value
[out]	p_ultcclks	TCCLKS field value for divisor
[in]	ul_boardmck	Board clock frequency (set to 0 for SAM4L devices)

Returns

The divisor found status.

Table 2. Return Values
Return value	Description
0	No suitable divisor was found
1	A divisor was found

Function tc_find_mck_divisor()

Returns