63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
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/* This is some sort of LCD display found on various cabinets. It is driven
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directly by amdaemon, and it has something to do with displaying the status
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of electronic payments.
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Part number in schematics is "VFD GP1232A02A FUTABA".
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Little else about this board is known. Black-holing the RS232 comms that it
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receives seems to be sufficient for the time being. */
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#include <windows.h>
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#include <assert.h>
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#include <stdint.h>
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#include "board/vfd.h"
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#include "hook/iohook.h"
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#include "hooklib/uart.h"
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#include "util/dprintf.h"
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#include "util/dump.h"
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static HRESULT vfd_handle_irp(struct irp *irp);
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static struct uart vfd_uart;
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static uint8_t vfd_written[512];
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static uint8_t vfd_readable[512];
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HRESULT vfd_hook_init(unsigned int port_no)
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{
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uart_init(&vfd_uart, port_no);
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vfd_uart.written.bytes = vfd_written;
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vfd_uart.written.nbytes = sizeof(vfd_written);
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vfd_uart.readable.bytes = vfd_readable;
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vfd_uart.readable.nbytes = sizeof(vfd_readable);
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return iohook_push_handler(vfd_handle_irp);
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}
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static HRESULT vfd_handle_irp(struct irp *irp)
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{
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HRESULT hr;
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assert(irp != NULL);
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if (!uart_match_irp(&vfd_uart, irp)) {
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return iohook_invoke_next(irp);
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}
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hr = uart_handle_irp(&vfd_uart, irp);
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if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
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return hr;
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}
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dprintf("VFD TX:\n");
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dump_iobuf(&vfd_uart.written);
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vfd_uart.written.pos = 0;
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return hr;
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}
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