Fix warning

[~andy/csm213a-hw] / yue / MMA8451Q / MMA8451Q.cpp

diff --git a/yue/MMA8451Q/MMA8451Q.cpp b/yue/MMA8451Q/MMA8451Q.cpp
index f65e807e7785cb43c57c11e4065dfc8b9f2c615d..4b26689c25be5d61dae4ec30493a884d2a8a8c51 100644 (file)
--- a/yue/MMA8451Q/MMA8451Q.cpp
+++ b/yue/MMA8451Q/MMA8451Q.cpp
@@ -143,7 +143,7 @@ void MMA8451Q::setDoubleTap(void){
 
 
 void MMA8451Q::readRegs(int addr, uint8_t * data, int len) {
-    char t[1] = {addr};
+    char t[1] = {(char)addr};
     m_i2c.write(m_addr, t, 1, true);
     m_i2c.read(m_addr, (char *)data, len);
 }