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 |
| D15 | UART1_TXD |
| D16 | UART1_RXD |
| D17 | UART1_RTS |
| D18 | UART1_CTS |
| T13 | BT Enable |
Included below is the specific entry in the arch/arm/mach-omap2/board-mityarm335x.c file.¶
- UART1_TXD
{"uart1_txd.uart1_txd", AM33XX_PULL_ENBL | AM33XX_PULL_ENBL}, - UART1_RXD
{"uart1_rxd.uart1_rxd", AM33XX_PIN_INPUT_PULLUP}, - UART1_RTS
{"uart1_rtsn.uart1_rtsn", AM33XX_PIN_INPUT}, - UART1_CTS
{"uart1_ctsn.uart1_ctsn", AM33XX_PIN_OUTPUT}, - BT Enable
{"gpmc_csn3.gpio2_0", AM33XX_PULL_ENBL | AM33XX_PIN_OUTPUT},/*BT EN*/
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