FreeCalypso > hg > freecalypso-hwlab
changeset 13:238a77db4134
lcdtest: read operations implemented, but don't work
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Fri, 06 Apr 2018 06:43:02 +0000 |
| parents | 5eaf832d57d0 |
| children | 5a602e512b12 |
| files | lcdtest/busops.c lcdtest/commands.c lcdtest/dispatch.c |
| diffstat | 3 files changed, 40 insertions(+), 0 deletions(-) [+] |
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--- a/lcdtest/busops.c Fri Apr 06 06:15:11 2018 +0000 +++ b/lcdtest/busops.c Fri Apr 06 06:43:02 2018 +0000 @@ -72,3 +72,27 @@ cmd[8] = val16; do_ftdi_write(cmd, 9); } + +bus_read(rs) +{ + u_char cmd[8], resp[2]; + + /* set RS */ + cmd[0] = 0x82; + cmd[1] = rs ? 0x03 : 0x02; + cmd[2] = 0x03; + /* read upper byte */ + cmd[3] = 0x90; + cmd[4] = 0; /* dummy addr */ + /* read lower byte */ + cmd[5] = 0x90; + cmd[6] = 0; /* dummy addr */ + /* send immediate */ + cmd[7] = 0x87; + do_ftdi_write(cmd, 8); + if (ftdi_read_data(&ftdi, resp, 2) != 2) { + fprintf(stderr, "FTDI read error: %s\n", ftdi.error_str); + exit(1); + } + return (resp[0] << 8) | resp[1]; +}
--- a/lcdtest/commands.c Fri Apr 06 06:15:11 2018 +0000 +++ b/lcdtest/commands.c Fri Apr 06 06:43:02 2018 +0000 @@ -1,6 +1,18 @@ #include <stdio.h> #include <stdlib.h> +cmd_ri() +{ + printf("%04X\n", bus_read(0)); + return(0); +} + +cmd_rd() +{ + printf("%04X\n", bus_read(1)); + return(0); +} + cmd_wi(argc, argv) char **argv; {
--- a/lcdtest/dispatch.c Fri Apr 06 06:15:11 2018 +0000 +++ b/lcdtest/dispatch.c Fri Apr 06 06:43:02 2018 +0000 @@ -4,6 +4,8 @@ #include <strings.h> #include <stdlib.h> +extern int cmd_rd(); +extern int cmd_ri(); extern int cmd_wd(); extern int cmd_wi(); extern int cmd_wr(); @@ -23,7 +25,9 @@ } cmdtab[] = { {"exit", 0, 0, cmd_exit}, {"quit", 0, 0, cmd_exit}, + {"rd", 0, 0, cmd_rd}, {"reset", 0, 0, reset_pulse}, + {"ri", 0, 0, cmd_ri}, {"wd", 1, 1, cmd_wd}, {"wi", 1, 1, cmd_wi}, {"wr", 2, 2, cmd_wr},