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Remove assertion of MDMRST in case of SARA-R4 #9902

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Merged
merged 1 commit into from
Mar 14, 2019
Merged

Remove assertion of MDMRST in case of SARA-R4 #9902

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11 changes: 9 additions & 2 deletions targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/TARGET_UBLOX_C030/ublox_low_level_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -24,11 +24,18 @@ void ublox_board_init(void) {
// Enable power to 3V3
gpio_init_inout(&gpio, PWR3V3, PIN_OUTPUT, OpenDrain, 1);

// start with modem disabled
gpio_init_out_ex(&gpio, MDMRST, 0);
#if defined(TARGET_UBLOX_C030_R41XM)
/* In case of SARA-R4, MDMRST needs to be asserted for 10 seconds before modem actually powers down.
* This means that modem is initially responsive to AT commands but powers down
* after 10 seconds unless MDMRST is de-asserted (onboard_modem_init()).
*
* This will cause confusion for application as CellularDevice::is_ready()
* will return TRUE initially and later modem will power off without any indication to application.
*/
gpio_init_out_ex(&gpio, MDMRST, 1);
gpio_init_inout(&gpio, MDMPWRON, PIN_OUTPUT, OpenDrain, 1);
#else
gpio_init_out_ex(&gpio, MDMRST, 0);
gpio_init_out_ex(&gpio, MDMPWRON, 0);
#endif
gpio_init_out_ex(&gpio, MDMRTS, 0);
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