uint32_t nrf_drv_ppi_uninit(void)
{
uint32_t err_code = NRF_SUCCESS;
uint32_t mask = NRF_PPI_ALL_APP_GROUPS_MASK;
nrf_ppi_channel_group_t group;
if (m_drv_state != NRF_DRV_STATE_UNINITIALIZED)
{
m_drv_state = NRF_DRV_STATE_UNINITIALIZED;
// Disable all channels and groups
#if (NRF_PPI_RESTRICTED > 0)
err_code = sd_ppi_channel_enable_clr(NRF_PPI_ALL_APP_CHANNELS_MASK);
if (err_code != NRF_SUCCESS)
{
return NRF_ERROR_INTERNAL;
}
for (group = NRF_PPI_CHANNEL_GROUP0; mask != 0; mask &= ~group_to_mask(group), group++)
{
if(mask & group_to_mask(group))
{
err_code = sd_ppi_group_task_disable((uint8_t)group);
if (err_code != NRF_SUCCESS)
{
return NRF_ERROR_INTERNAL;
}
}
}
#else
nrf_ppi_channel_disable_all();
for (group = NRF_PPI_CHANNEL_GROUP0; mask != 0; mask &= ~group_to_mask(group), group++)
{
if(mask & group_to_mask(group))
{
nrf_ppi_channel_group_clear(group);
}
}
#endif
channel_allocated_clr_all();
group_allocated_clr_all();
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
}
return err_code;
}
uint32_t nrf_drv_ppi_group_alloc(nrf_ppi_channel_group_t * p_group)
{
uint32_t err_code;
uint32_t mask = 0;
nrf_ppi_channel_group_t group;
err_code = NRF_ERROR_NO_MEM;
mask = NRF_PPI_ALL_APP_GROUPS_MASK;
for (group = NRF_PPI_CHANNEL_GROUP0; mask != 0; mask &= ~group_to_mask(group), group++)
{
CRITICAL_REGION_ENTER();
if ((mask & group_to_mask(group)) && (!is_allocated_group(group)))
{
group_allocated_set(group);
*p_group = group;
err_code = NRF_SUCCESS;
}
CRITICAL_REGION_EXIT();
if (err_code == NRF_SUCCESS)
{
NRF_LOG_INFO("Allocated group: %d.\r\n", group);
break;
}
}
NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)ERR_TO_STR(err_code));
return err_code;
}
uint32_t nrf_drv_ppi_uninit(void)
{
ret_code_t err_code = NRF_SUCCESS;
uint32_t mask = NRF_PPI_ALL_APP_GROUPS_MASK;
nrf_ppi_channel_group_t group;
if (m_drv_state == NRF_DRV_STATE_UNINITIALIZED)
{
err_code = NRF_ERROR_INVALID_STATE;
NRF_LOG_WARNING("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)ERR_TO_STR(err_code));
return err_code;
}
m_drv_state = NRF_DRV_STATE_UNINITIALIZED;
// Disable all channels and groups
nrf_ppi_channels_disable(NRF_PPI_ALL_APP_CHANNELS_MASK);
for (group = NRF_PPI_CHANNEL_GROUP0; mask != 0; mask &= ~group_to_mask(group), group++)
{
if (mask & group_to_mask(group))
{
nrf_ppi_channel_group_clear(group);
}
}
channel_allocated_clr_all();
group_allocated_clr_all();
NRF_LOG_INFO("Function: %s, error code: %s.\r\n", (uint32_t)__func__, (uint32_t)ERR_TO_STR(err_code));
return err_code;
}
uint32_t nrf_drv_ppi_group_alloc(nrf_ppi_channel_group_t * p_group)
{
uint32_t err_code;
uint32_t mask = 0;
nrf_ppi_channel_group_t group;
err_code = NRF_ERROR_NO_MEM;
mask = NRF_PPI_ALL_APP_GROUPS_MASK;
for (group = NRF_PPI_CHANNEL_GROUP0; mask != 0; mask &= ~group_to_mask(group), group++)
{
CRITICAL_REGION_ENTER();
if ((mask & group_to_mask(group)) && (!is_allocated_group(group)))
{
group_allocated_set(group);
*p_group = group;
err_code = NRF_SUCCESS;
}
CRITICAL_REGION_EXIT();
if (err_code == NRF_SUCCESS)
{
break;
}
}
return err_code;
}
uint32_t nrf_drv_ppi_uninit(void)
{
uint32_t mask = NRF_PPI_ALL_APP_GROUPS_MASK;
nrf_ppi_channel_group_t group;
if (m_drv_state == NRF_DRV_STATE_UNINITIALIZED)
{
return NRF_ERROR_INVALID_STATE;
}
m_drv_state = NRF_DRV_STATE_UNINITIALIZED;
// Disable all channels and groups
nrf_ppi_channels_disable(NRF_PPI_ALL_APP_CHANNELS_MASK);
for (group = NRF_PPI_CHANNEL_GROUP0; mask != 0; mask &= ~group_to_mask(group), group++)
{
if(mask & group_to_mask(group))
{
nrf_ppi_channel_group_clear(group);
}
}
channel_allocated_clr_all();
group_allocated_clr_all();
return NRF_SUCCESS;
}
/**@brief Set group allocated indication.
* @param[in] group_num Specifies the group to set the "allocated" indication.
*/
__STATIC_INLINE void group_allocated_set(nrf_ppi_channel_group_t group)
{
m_groups_allocated |= group_to_mask(group);
}
/**@brief Check whether a group is allocated.
* @param[in] group_num Group number to check.
* @retval true The group is allocated.
* false The group is not allocated.
*/
__STATIC_INLINE bool is_allocated_group(nrf_ppi_channel_group_t group)
{
return ((m_groups_allocated & group_to_mask(group)) != 0);
}
/**@brief Check whether a channel group can be used by an application.
* @param[in] group Group to check.
* @retval true The group is an application group.
* false The group is not an application group (this group either does not exist or
* it is used by a SoftDevice).
*/
__STATIC_INLINE bool is_app_group(nrf_ppi_channel_group_t group)
{
return ((NRF_PPI_ALL_APP_GROUPS_MASK & group_to_mask(group)) != 0);
}
