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tmp105-test: Wrap simple building blocks for testing 

The next patches will add more reads and writes.  Add a simple testing
API for this.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Paolo Bonzini 2014-03-31 18:26:33 +02:00 committed by Andreas Färber
parent efdf6a56a7
commit cebac61498
1 changed files with 40 additions and 22 deletions
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62
tests/tmp105-test.c
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@ -20,37 +20,55 @@
static I2CAdapter *i2c;
static uint8_t addr;
static void send_and_receive(void)
static uint16_t tmp105_get16(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
{
uint8_t resp[2];
i2c_send(i2c, addr, &reg, 1);
i2c_recv(i2c, addr, resp, 2);
return (resp[0] << 8) | resp[1];
}
static void tmp105_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
uint8_t value)
{
uint8_t cmd[2];
uint8_t resp[1];
cmd[0] = reg;
cmd[1] = value;
i2c_send(i2c, addr, cmd, 2);
i2c_recv(i2c, addr, resp, 1);
g_assert_cmphex(resp[0], ==, cmd[1]);
}
static void tmp105_set16(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
uint16_t value)
{
uint8_t cmd[3];
uint8_t resp[2];
cmd[0] = TMP105_REG_TEMPERATURE;
i2c_send(i2c, addr, cmd, 1);
i2c_recv(i2c, addr, resp, 2);
g_assert_cmpuint(((uint16_t)resp[0] << 8) | resp[1], ==, 0);
cmd[0] = TMP105_REG_CONFIG;
cmd[1] = 0x0; /* matches the reset value */
i2c_send(i2c, addr, cmd, 2);
i2c_recv(i2c, addr, resp, 1);
g_assert_cmphex(resp[0], ==, cmd[1]);
cmd[0] = TMP105_REG_T_LOW;
cmd[1] = 0x12;
cmd[2] = 0x34;
cmd[0] = reg;
cmd[1] = value >> 8;
cmd[2] = value & 255;
i2c_send(i2c, addr, cmd, 3);
i2c_recv(i2c, addr, resp, 2);
g_assert_cmphex(resp[0], ==, cmd[1]);
g_assert_cmphex(resp[1], ==, cmd[2]);
}
cmd[0] = TMP105_REG_T_HIGH;
cmd[1] = 0x42;
cmd[2] = 0x31;
i2c_send(i2c, addr, cmd, 3);
i2c_recv(i2c, addr, resp, 2);
g_assert_cmphex(resp[0], ==, cmd[1]);
g_assert_cmphex(resp[1], ==, cmd[2]);
static void send_and_receive(void)
{
uint16_t value;
value = tmp105_get16(i2c, addr, TMP105_REG_TEMPERATURE);
g_assert_cmpuint(value, ==, 0);
/* reset */
tmp105_set8(i2c, addr, TMP105_REG_CONFIG, 0);
tmp105_set16(i2c, addr, TMP105_REG_T_LOW, 0x1234);
tmp105_set16(i2c, addr, TMP105_REG_T_HIGH, 0x4231);
}
int main(int argc, char **argv)