Kart/Bluetooth
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(→Test pins) |
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== Test pins == | == Test pins == | ||
− | The | + | The Kart controller design leaves 4 free pins. |
Pins 1 to 2 are foreseen for test outputs. | Pins 1 to 2 are foreseen for test outputs. | ||
Pins 3 and 8 are foreseen for test outputs with a divider by 2 for pulses. | Pins 3 and 8 are foreseen for test outputs with a divider by 2 for pulses. | ||
[[Category:Kart]] | [[Category:Kart]] |
Revision as of 13:53, 1 July 2020
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The kart's Bluetooth boards hold a SOC which is programmed as an RS232 modem. The also comprise a legacy RS232 port.
Connectors
The long side single 18-pin row connector is used to program the Bluetooth module.
The 10-pin header connector corresponds to the RS232 port. A flat cable can be crimped with a female header in one side and a female RS232 connector on the other.
An unmounted 4-pin single row connector provides a differential stereo audio output.
Connection between FPGA and Bluetooth module
Both components connect via:
- a serial port link
- an 8-bit parallel port
The serial port is used for sending the controls and receiving the status information.
The parallel port is driven by the Bluetooth module:
- Parallel port bit 0 is brought high when the Bluetooth module has successfully achieved a connection, e.g. with a mobile phone.
Additionally, the FPGA:
- pulses the BT
reset_n
line at power-up - drives the BT
VReg_en
line high after the reset
Test pins
The Kart controller design leaves 4 free pins. Pins 1 to 2 are foreseen for test outputs. Pins 3 and 8 are foreseen for test outputs with a divider by 2 for pulses.