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Merge pull request #9902 from wajahat-ublox/r412m_reset 

Remove assertion of MDMRST in case of SARA-R4
pull/9914/head
Martin Kojtal 2019-03-14 09:40:44 +01:00 committed by GitHub
parent 897d15a9bc b7b083e6a2
commit 1bbf7d69d1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 2 deletions
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11
targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F437xG/TARGET_UBLOX_C030/ublox_low_level_api.c
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@ -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);