WiFi Hardware Interface on Module¶
The MitySOM-335x TiWi-BLE module uses MMC1 as the communication interface between the AM335x processor and the WiFi radio of the LSR TiWi-BLE module.
Bluetooth Hardware Interface¶
The Bluetooth radio is connected through a UART1 (TX/RX/CTS/RTS) interface on the MitySOM-335x to the AM335x CPU. Also required is a single enable GPIO for the Bluetooth radio.
| AM335x Ball | TiWi-BLE Function |
| V9 | MMC1_CMD_MUX0 |
| U9 | MMC1_CLK_MUX0 |
| U10 | MMC1_DAT0_MUX0 |
| T10 | MMC1_DAT1_MUX0 |
| T11 | MMC1_DAT2_MUX0 |
| U12 | MMC1_DAT3_MUX0 |
| R12 | WL Enable - GPIO1_13 |
| T12 | WL_IRQ - GPIO1_12 |
Included below is the specific entry in the arch/arm/mach-omap2/board-mityarm335x.c file.¶
- MMC1_CMD_MUX0
{"gpmc_csn2.mmc1_cmd", AM33XX_PIN_INPUT_PULLUP}, - MMC1_CLK_MUX0
{"gpmc_csn1.mmc1_clk", AM33XX_PIN_INPUT_PULLUP}, - MMC1_DAT0_MUX0
{"gpmc_ad8.mmc1_dat0", AM33XX_PIN_INPUT_PULLUP}, - MMC1_DAT1_MUX0
{"gpmc_ad9.mmc1_dat1", AM33XX_PIN_INPUT_PULLUP}, - MMC1_DAT2_MUX0
{"gpmc_ad10.mmc1_dat2", AM33XX_PIN_INPUT_PULLUP}, - MMC1_DAT3_MUX0
{"gpmc_ad11.mmc1_dat3", AM33XX_PIN_INPUT_PULLUP}, - WL Enable - GPIO1_13
{"gpmc_ad13.gpio1_13", AM33XX_PULL_ENBL | AM33XX_PIN_OUTPUT},/*WL EN*/ - WL_IRQ - GPIO1_12
{"gpmc_ad12.gpio1_12", AM33XX_PIN_INPUT_PULLUP},/*IRQ*/
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