riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge pull request #14025 from fjmolinas/pr_nrf5x_rtt_conf

Browse Source 
boards/common/nrf5x: add configurable RTT_FREQUENCY
This commit is contained in:
Alexandre Abadie 2020-05-05 17:46:05 +02:00 committed by GitHub
commit 5773db93f8
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 26 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
boards/common/nrf51/include/cfg_rtt_default.h
View File

@ -29,11 +29,21 @@ extern "C" {
* @name Real time counter configuration
* @{
*/
#define RTT_DEV (1) /* NRF_RTC1 */
#define RTT_MAX_VALUE (0x00ffffff)
#define RTT_FREQUENCY (1024)
#ifndef RTT_DEV
#define RTT_DEV (1) /* NRF_RTC1 */
#endif
#define RTT_MAX_VALUE (0x00ffffff) /* 24bit */
#define RTT_MAX_FREQUENCY (32768U) /* in Hz */
#define RTT_MIN_FREQUENCY (8U) /* in Hz */
#define RTT_CLOCK_FREQUENCY (32768U) /* in Hz, LFCLK*/
#ifndef RTT_FREQUENCY
#define RTT_FREQUENCY (1024U) /* in Hz */
#endif
/** @} */
#ifdef __cplusplus
} /* end extern "C" */
#endif

15
boards/common/nrf52/include/cfg_rtt_default.h
View File

@ -28,9 +28,18 @@ extern "C" {
* @name Real time counter configuration
* @{
*/
#define RTT_DEV (1) /* NRF_RTC1 */
#define RTT_MAX_VALUE (0x00ffffff)
#define RTT_FREQUENCY (1024)
#ifndef RTT_DEV
#define RTT_DEV (1) /* NRF_RTC1 */
#endif
#define RTT_MAX_VALUE (0x00ffffff) /* 24bit */
#define RTT_MAX_FREQUENCY (32768U) /* in Hz */
#define RTT_MIN_FREQUENCY (8U) /* in Hz */
#define RTT_CLOCK_FREQUENCY (32768U) /* in Hz, LFCLK*/
#ifndef RTT_FREQUENCY
#define RTT_FREQUENCY (1024U) /* in Hz */
#endif
/** @} */
#ifdef __cplusplus

4
cpu/nrf5x_common/periph/rtt.c
View File

@ -38,8 +38,6 @@
#error "RTT configuration: invalid or no RTC device specified (RTT_DEV)"
#endif
#define LFCLK_FREQ (32768U)
/* allocate memory for callbacks and their args */
static rtt_cb_t alarm_cb;
static void *alarm_arg;
@ -59,7 +57,7 @@ void rtt_init(void)
/* configure interrupt */
NVIC_EnableIRQ(IRQn);
/* set prescaler */
DEV->PRESCALER = (LFCLK_FREQ / RTT_FREQUENCY) - 1;
DEV->PRESCALER = (RTT_CLOCK_FREQUENCY / RTT_FREQUENCY) - 1;
/* start the actual RTT thing */
DEV->TASKS_START = 1;
}